The URL can be used to link to this page

2021.0053 21-120 RPT-Stormwater Site Plan-2021-09-23 ENGINEERED DRAINAGE REPORT of Farrelli’s Yelm 813 W Yelm Avenue Yelm, Washington 98597 for Blackrock Industries 1106 39th Ave SE Puyallup, WA 98374 by THE LAND DEVELOPER’S ENGINEERED SOLUTION A Division of THE LAND DEVELOPER, LLC Erik B. Ainsworth, PE PO Box 4420 Tumwater, WA 98501 (360) 250-3973 September 23, 2021 Farrelli’s Yelm September 23, 2021 Page 2 TABLE OF CONTENTS I. PROJECT OVERVIEW ............................................................................... 3 II. EXISTING CONDITIONS ............................................................................ 5 III. OFF-SITE ANALYSIS REPORT ................................................................. 5 IV. STORMWATER MANAGEMENT MINIMUM REQUIREMENTS ................ 5 VIII. APPENDICES Appendix A Drainage & Erosion Control Plans Appendix B Soils Report Appendix C WWHM Analysis Appendix D Commercial Source Control Plan Farrelli’s Yelm September 23, 2021 Page 3 I. PROJECT OVERVIEW The subject site consists of an existing restaurant building that will be removed and replaced and the onsite parking lot and pond will be demolished, filled and replaced with a new parking lot. A new restaurant and a new parking lot will be installed with an infiltration trench under the parking lot. Lot coverage is as follows: EXISTING LOT COVERAGE: LOT SIZE: 58,890 SF EX FOOTPRINT: 3,608 SF EX DRIVEWAY/ PARKING: 8,750 SF CONCRETE SIDEWALK: 1,077 SF TOTAL COVERAGE: 13,435 SF OR 22% PROPOSED LOT COVERAGE PROPOSED FOOTPRINT: 4,180 SF EX DRIVEWAY/ P-LOT: 33,200 SF CONCRETE SIDEWALK: 1,700 SF TOTAL COVERAGE: 39,080 SF OR 66% All of the impervious surface is proposed to be directed to the Infiltration trench located under the proposed driveway. There will likely be approximately 19,810 sf of landscaped area tributary to the infiltration trench. The proposed parking area and roof will be directed to the proposed infiltration trench. The parking lot will be treated in catch basin filters prior flowing into the infiltration trench. A WWHM analysis for the treatment and infiltration of the site was performed size the facilities. The tax parcel number is 21724130700. The legal description as shown on the Thurston County Assessor Website is as follows: Section 24 Township 17 Range 1E Quarter SW NE BLA028302YL TR A Document 3655065 The project was analyzed utilizing LID discharge standards and the proposed site meets LID standards using a treatment catch basins and infiltration trench. A WWHM analysis was performed to size the trench that is 70 lf long by 20 feet wide by 4’ deep infiltration trench. The WWHM analysis for treatment design showed (5) cartridge filter manhole meets design requirements. Farrelli’s Yelm September 23, 2021 Page 4 The landscaped areas shall utilize amended soil to improve the drainage characteristics of these areas. The amended soil shall comply with section 6.2 of the LID Technical Guidance Manual for Puget Sound, 2012. See Appendix B for Basin Map and Site Plan. Farrelli’s Yelm September 23, 2021 Page 5 II. EXISTING CONDITIONS The subject site consists of an existing restaurant building that will be removed and replaced and the onsite parking lot and pond will be demolished, filled and replaced with a new parking lot. The site topography generally flat sloping from west to east. There does not appear to be much if any tributary flow that comes from adjacent lots due to the minimal sloping topography. The frontage roadways do not drain onto the lot. The property is vegetated with grass. There does not appear to be any ravines, wetlands or other critical areas on the site. Per the attached soils report a design infiltration rate of 10 inches per hour was used for the infiltration trench. The project does not appear to be located in an aquifer recharge area. Thurston County Geodata list the site as located in a wellhead protection area. There are no known basin plans for the area. Refer to appendix B for applicable Drainage Maps. III. OFF-SITE ANALYSIS REPORT This project proposes to infiltration all stormwater onsite therefore no significant downstream impacts are anticipated for this project. IV. STORMWATER MANAGEMENT MINIMUM REQUIREMENTS There are nine minimum requirements for stormwater management the DOE stormwater manual. The minimum requirements are: 1. Preparation of Stormwater Site Plan 2. Construction Stormwater Pollution Prevention 3. Source Control of Pollution 4. Preservation of Natural Drainage Systems and Outfalls 5. Onsite Stormwater Management 6. Runoff Treatment 7. Flow Control 8. Wetlands Protection 9. Operation and Maintenance In addressing these nine requirements, it is anticipated that the proposed project will have little or no adverse effects on the downstream and surrounding hydrology. Each of the minimum requirements is discussed below. Minimum Requirement #1: Preparation of Stormwater Site Plan This Stormwater Site Plan is submitted as part of the Farrelli’s Yelm project to meet this requirement. Farrelli’s Yelm September 23, 2021 Page 6 Minimum Requirement #2: Construction Stormwater Pollution Prevention A Construction Stormwater Pollution Prevention Plan (SWPPP) was developed to address erosion and sediment control anticipated during construction. The SWPPP will address all Thirteen elements as required by the Department of Ecology. Minimum Requirement #3: Source Control of Pollution The property owner will receive a copy of the Pollution Source Control Program as found in the Stormwater Maintenance Plan in Section VII below. The Source Control Program describes Best Management Practices (BMPs) for household products, automotive maintenance, pesticides, fertilizers and remodeling. Minimum Requirement #4: Preservation of Natural Drainage Systems and Outfalls The subject site consists of a developed lot used restaurant. There are commercial lots located on all adjacent lots located. The site topography generally flat sloping from west to east. There does not appear to be much if any tributary flow that comes from adjacent lots due to the minimal sloping topography. The frontage roadways do not drain onto the lot. There does not appear to be any ravines, wetlands or other critical areas on the site. All natural drainage ways are likely to be preserved. Minimum Requirement #5: Onsite Stormwater Management, Including Easements and Setbacks List #2: On-site Stormwater Management BMP’s for Projects Triggering Minimum Requirements #1 through #9 For each surface, consider the BMP’s in the order listed for that type of surface. Use the first BMP that is considered feasible. No other Onsite Stormwater Management BMP is necessary for that surface. Lawn and landscaped areas: • Utilize Post-Construction Soil Quality and Depth in accordance with BMP T5.13 in Chapter 5 of Volume V Roofs: 1. Full Dispersion in accordance with BMP T5.30 in Chapter 5 of Volume V, or Downspout Full Infiltration Systems in accordance with BMP T5.10A in Section 3.1.1 in Chapter 3 of Volume III. Downspout infiltration is proposed. A WWHM analysis was performed to size the infiration trench for the roof and driveway impervious area. 2. Bioretention in accordance with Volume V, Chapter 7 of this manual. Not used. Farrelli’s Yelm September 23, 2021 Page 7 3. For single-family residential roofs and commercial roofs determined by Thurston County to have similar runoff pollution characteristics to single-family residential roofs, Downspout Dispersion Systems in accordance with BMP T5.10B in Volume III, Chapter 3 of this manual. Not applicable for this project. 4. For single-family residential roofs and commercial roofs determined by Snohomish County to have similar runoff pollution characteristics to single-family residential roofs, Perforated Stub-out Connections in accordance with BMP T5.10C in Volume III, Chapter 3 of this manual. Not applicable for this project. Other Hard Surfaces: 1. Full Dispersion in accordance with BMP T5.30 in Chapter 5 of Volume V. Full Dispersion is not feasible due to dense project layout. 2. Permeable pavement in accordance with BMP T5.15 in Volume V, Chapter 5 of this manual. NOTE: This is not a requirement to pave these surfaces. Where pavement is proposed, it must be permeable to the extent feasible unless full dispersion is employed. Permeable pavement is not proposed for this project. Treatment is proposed via treatment cartridges through analysis. An infiltration trench is proposed to infiltrate the parking lot stormwater via WWHM analysis. 3. Bioretention in accordance with Volume V, Chapter 7 of this manual. Bioretention is proposed for this site. Treatment is proposed via treatment cartridges through analysis. An infiltration trench is proposed to infiltrate the parking lot stormwater via WWHM analysis. 4. Sheet Flow Dispersion in accordance with BMP T5.12, or Concentrated Flow Dispersion in accordance with BMP T5.11 in Volume V, Chapter 5 of this manual. Sheet Flow Dispersion is not used. The following tables describe the onsite land-uses that were used in the WWHM analysis. Farrelli’s Yelm September 23, 2021 Page 8 Table 2.1 WWHM Developed Mitigated Onsite Land Use Summary WWHM Developed Land Use (All Areas Measured in Acres) Existing Proposed A/B, Forest, Flat 1.35 0.00 A/B, Lawn, Flat 0.00 0.00 A/B, Pasture, Flat 0.00 0.45 Roads Flat-(Parking Lot) 0.00 0.80 Roofs Flat 0.00 0.10 Pond 0.00 0.00 Total Basin 1.35 1.35 Table 3.1 Threshold Discharge Area (All Areas Measured in Acres) Proposed Total Non-Pollution Generating Impervious Surface (NPGIS) 0.10 Total Pollution Generating Impervious Surface (PGIS) 0.80 Total Pollution Generating Pervious Surface (PGPS) 0.00 Native Vegetation Converted to Lawn/Landscape 0.45 Native Vegetation Not Converted 0.00 Total Effective Impervious Surface (Impervious Draining to Infiltration fac.) 1.35 Increase (Decrease) in 100-year Storm Peak (cfs) (0.056) Discharge Point trench Table 3.3 Treatment Requirements by Threshold Discharge Area < ¾ Acres of PGPS > ¾ Acres of PGPS < 5,000 ft2 of PGIS > 5,000 ft 2 of PGIS Onsite Stormwater BMPs X X Farrelli’s Yelm September 23, 2021 Page 9 Table 3.4 Flow Control Requirements by Threshold Discharge Area Onsite Stormwater Management BMPs < ¾ acres conversion to lawn/landscape or < 2.5 acres to pasture. X > ¾ acres conversion to lawn/landscape or > 2.5 acres to pasture. < 10,000 ft2 of effective impervious area. X > 10,000 ft2 of effective impervious area. > 0.1 cfs increase in the 100-year return frequency flow. Per the WWHM Analysis the site meets LID requirements. Reference the attached WWHM analysis. Minimum Requirement #6: Runoff Treatment For sites with greater than 5,000 square feet of pollution generating impervious surface (PGIS), treatment facilities and onsite stormwater BMPs are required. This proposed project has more than 5,000 square feet of PGIS therefore treatment is required. The treatment cartridges were sized to meet the treatment requirements for the project. Minimum Requirement #7: Flow Control Other Hard Surfaces: 1. Full Dispersion in accordance with BMP T5.30 in Chapter 5 of Volume V. Full Dispersion is not feasible due to dense project layout. 2. Permeable pavement in accordance with BMP T5.15 in Volume V, Chapter 5 of this manual. NOTE: This is not a requirement to pave these surfaces. Where pavement is proposed, it must be permeable to the extent feasible unless full dispersion is employed. Permeable pavement is not proposed for this project. Treatment is proposed via treatment cartridges through analysis. An infiltration trench is proposed to infiltrate the parking lot stormwater via WWHM analysis. See Appendix B for Basin Map and Site Plan. Minimum Requirement #8: Wetlands Protection There do not appear to be any wetlands on the subject parcel. Minimum Requirement #9: Operation and Maintenance The property owner will be responsible for maintaining the stormwater facilities. The Stormwater Maintenance Plan is contained in a separate report. The maintenance plan describes maintenance Farrelli’s Yelm September 23, 2021 Page 10 and operation of the treatment cartridges, Compost Amended Soils, Infiltration Facilities, catch basins, conveyance piping, and landscaping and how property owners can minimize use of hazardous household products. Farrelli’s Yelm September 23, 2021 APPENDIX A –Drainage & Erosion Control Plan 2 0 . 0 2 'WWWWWWCONTROLVALVECONTROLVALVEW S 3 6 ° 2 2 ' 3 5 " W 3 0 2 . 0 2 ' S 36°26'51"W 279.50'N 53°33'9"W 172.36'N 53°30'7"W 195.55'35034934834734634634634534534434334234133933834034534 5 SS SSSSSSSSSSSSSSSSSSSSS S 344343342341340 XXXXXXXXXXXX X X X X X X X X X X X X X X X X XXXXXXXXXXXXXXXXXXXXXXXXXXXXCOCOCOCOCOSDSDSDSDSDSDSDSDSD FOR MAINTENANCE CALL 1.800.338.1122 www.contechES.comTMClean water starts hereSDSDSDSDSDSD SD EXISTINGPROPOSEDSUBJECT PROPERTY LINEADJACENT LOT LINEEASEMENT LINERIGHT-OF-WAY LINECENTER LINECONTOUR, MAJORCONTOUR, MINORPOWER POLEGUY WIRESTREET LIGHTTELEPHONE LINETELEPHONE MANHOLETELEPHONE PEDESTALCABLE LINECABLE PEDESTALSEWER MAIN LINESEWER MANHOLESTORM MAIN LINETYPE I CATCH BASINCLEANOUTYARD DRAINWATER MAIN LINEWATER METERBLOWOFF VALVEFIRE HYDRANTGATE VALVENATURAL GAS LINEFOOTING DRAIN LINEROOF DRAIN LINEDOWNSPOUTCONIFEROUS TREEDECIDUOUS TREESTREET SIGNPOWER LINEPOWER VAULTCATCH BASINDSCOOVERHEAD POWER LINETVTTBOCONCRETEASPHALT PAVEMENTLANDSCAPINGGRAVELPOROUS ASPHALT160158160WETLAND BUFFER LINEHABITAT BUFFER LINE158YDCOVER SHEET AND EX SITE PLAN1 FARRELLIS BLACKROCK813 W YELM AVE , YELM, WA 985970SCALE:1" = 20'2040PROJECT INFOLEGAL DESCRIPTIONOWNER:FP YELM LLC1590 WILMINGTON DRDUPONT, WA 98327Section 24 Township 17 Range 1E Quarter SW NEBLA028302YL TR A Document 3655065PARCEL NUMBER21724130700BUILDING AREALOT SIZE:58,890 SFEX FOOTPRINT: 3,608 SFEX DRIVEWAY/ PARKING: 8,750 SFCONCRETE SIDEWALK: 1,077 SFTOTAL COVERAGE:13,435 SFOR 22%VERTICAL DATUMCONTRACTOR AS-BUILT:THE CONTRACTOR SHALL MAINTAIN ONE SET OF THE CONTRACTDRAWINGS THAT SHALL INCLUDE, CLEARLY AND LEGIBLY MARKED,ANY ALTERATIONS OR LOCATIONS OF UNDERGROUND UTILITIESENCOUNTERED DURING PROGRESS OF THIS PROJECT, AND ANYALTERATIONS MADE TO THE FACILITIES BEING INSTALLED. SAIDDRAWINGS SHALL BE MARKED "AS-BUILT" AND SHALL BE SUBMITTEDTO THE PROJECT ENGINEER UPON COMPLETION OF THE PROJECT.CONSTRUCTION STAKING:THIS PROJECT MUST BE STAKED PRIOR TO CONSTRUCTION BY THEDESIGN ENGINEER OR BY A LICENSED LAND SURVEYOR.THIS DRAWING DOES NOT REPRESENT A RECORD DOCUMENTUNLESS CERTIFIED BY THE LAND DEVELOPER'S INC.ANY ALTERATIONS TO THE DESIGN SHOWN HERON MUST BEREVIEWED AND APPROVED BY THE LAND DEVELOPER'S, INCTOPOGRAPHIC NOTE:THE EXISTING TOPOGRAPHIC DATA SHOWN ON THESE DRAWINGS HASBEEN PREPARED, IN PART, BASED UPON INFORMATION FURNISHED BYOTHERS. WHILE THIS INFORMATION IS BELIEVED TO BE RELIABLE, THELAND DEVELOPER'S, INC. CANNOT ENSURE ITS ACCURACY AND THUS ISNOT RESPONSIBLE FOR THE ACCURACY OF THAT INFORMATION OR FORANY ERRORS OR OMISSIONS WHICH MAY HAVE BEEN INCORPORATEDINTO THESE DRAWINGS AS A RESULT.NOTE:THE CONTRACTOR SHALL BE FULLYRESPONSIBLE FOR THE LOCATIONAND PROTECTION OF ALL EXISTINGUTILITIES. THE CONTRACTOR SHALLVERIFY ALL UTILITY LOCATIONS PRIORTO CONSTRUCTION BY CALLING THEUNDERGROUND LOCATE LINE AT800-824-5555 A MINIMUM OF 48 HOURSPRIOR TO ANY EXCAVATIONBASIS OF BEARINGVICINITY MAPNTSPROJECTLOCATIONLEGENDTHURSTON COUNTY AERIALTHURSTON COUNTY ASSESSOR MAPTHE LAND DEVELOPER'S ENGINEERED SOLUTION 5737 LINDERSON WAY SW, TUMWATER, WA. 98501 PO BOX 4420, TUMWATER, WA. 98501 (360) 890-4806 E-MAIL: erik@thelanddeveloper.com THE LAND DEVELOPER, INC.a division of PROJECT: CLIENT: FARRELLIS BLACKROCK 813 W YELM AVE YELM, WA 98597 BLACKROCK INDUSTRIES REVISIONS: DATE:DRAWN BY:DATE:AGENCY NO:SHEET:JOB NO:OF21-120608/02/2021SaGFARRELLIS BLACKROCK NE 1/4, SECTION 24, TOWNSHIP 17 N., RANGE 1 E., W.M.ERI K B AINSWORTHPROFESSIONAL ENGI N EER STAT E OF WASHINGTONREGISTERED09/23/21SEPTIC TANKGREASERECEPTOREXISTINGBUILDINGEXISTINGPARKINGLOTEXISTINGPONDEXISTINGBIOFILTRATIONSWALEUTILITYEASEMENT15' UTILITYEASEMENTPROPOSED BUILDING AREAPROPOSED FOOTPRINT: 4,180 SFEX DRIVEWAY/ P-LOT: 33,200 SFCONCRETE SIDEWALK: 1,700 SFTOTAL COVERAGE: 39,080 SFOR 66%PROPOSED PARKING LOTPROPOSED ENLARGEDBIORETENTION PONDPROPOSED LANDSCAPING AREAPROPOSEDRESTAURANTFF 349.00EXISTINGBUILDING 2 0 . 0 2 'WWWWWWW S 3 6 ° 2 2 ' 3 5 " W 3 0 2 . 0 2 ' S 3 6 ° 2 6 ' 5 1 " W 2 7 9 . 5 0 'N 53°33'9"W 172.36'N 53°30'7"W 195.55'35034935134834734634634634534534434334234133933834034534 5 S S SSSSSSSSSSSSSSSSSSSSSSS S 34 4 34 3 34 2 34 1 3 4 0 XXXXXXXXXXXX X X X X X X X X X X X X X X X X XXXXXXXXXXXXXXXXXXXXXXXXXXXX FOR MAINTENANCE CALL 1.800.338.1122 www.con techE S.c om TM Cle an water s tart s hereNOTE:FILTER FABRIC FENCES SHALL BEINSTALLED ALONG CONTOURSWHENEVER POSSIBLEJOINTS IN FILTER FABRIC SHALL BE SPLICEDAT POSTS. USE STAPLES, WIRE RINGS OREQUIVALENT TO ATTACH FABRIC TO POSTS.FILTER FABRICBACKFILL TRENCH WITHNATIVE SOIL OR 3/4" TO1-1/2" WASHED GRAVELMINIMUM 4"x4" TRENCH2"x4" WOOD POSTS, STEELFENCE POSTS, REBAR, OREQUIVALENT6' MAX.POST SPACING MAY BEINCREASED TO 8' IFWIRE BACKING IS USED12" MIN.2' MIN.2"x2"x14 Ga. WIRE OREQUIVALENT, IF STANDARDSTRENGTH FABRIC USEDSCALE:2SILT FENCENTS12" MIN.THICKNESSPROVIDE FULL WIDTH OFINGRESS/EGRESS AREAIF A ROADSIDE DITCHIS PRESENT, INSTALLDRIVEWAY CULVERTPER KCRDCSGEOTEXTILE4"- 8" QUARRYSPALLSR=25' MIN.25' MIN.EXISTING ROAD15' MIN.SCALE:1CONSTRUCTION ENTRANCENTSEROSION CONTROL PLAN2 0SCALE:1" = 20'2040THE LAND DEVELOPER'S ENGINEERED SOLUTION 5737 LINDERSON WAY SW, TUMWATER, WA. 98501 PO BOX 4420, TUMWATER, WA. 98501 (360) 890-4806 E-MAIL: erik@thelanddeveloper.com THE LAND DEVELOPER, INC.a division of PROJECT: CLIENT: FARRELLIS BLACKROCK 813 W YELM AVE YELM, WA 98597 BLACKROCK INDUSTRIES REVISIONS: DATE:DRAWN BY:DATE:AGENCY NO:SHEET:JOB NO:OF21-120608/02/2021SaGFARRELLIS BLACKROCK NE 1/4, SECTION 24, TOWNSHIP 17 N., RANGE 1 E., W.M.ERI K B AINSWORTHPROFESSIONAL ENGI N EER STAT E OF WASHINGTONREGISTERED09/23/21EXISTINGBUILDINGTO BEREMOVEDCONSTRUCTIONENTRANCECONSTRUCTION LIMITSSILT FENCEEXISTINGPOND TO BEREMOVED S 3 6 ° 2 2 ' 3 5 " W 3 0 2 . 0 2 ' S 3 6 ° 2 6 ' 5 1 " W 2 7 9 . 5 0 'N 53°33'9"W 172.36'N 53°30'7"W 195.55'35034935134834734634634634534534434334234133933834034534 5 34 4 34 3 34 2 34 1 3 4 0 XXXXXXXXXXXX X X X X X X X X X X X X X X X X XXXXXXXXXXXXXXXXXXXXXXXXXXXX2. 2 0 %PROPOSED ASPHALTPARKING LOT2" ASPHALT OVER2" CSTC OVER6" CSBC OVERCOMPACTED SUBGRADEPER DETAIL 4-S3R20'R3'R20'R5'R3' R3.5' R3' R3'R3'R3' R3'R3'R20'30'16.85'22.47'9'9' 9'16.85'16.91'19.96'2 2 . 4 1 ' 1 6 . 9 1 '17.05'20.13'24.87'20.01'R3'R20'21.1'20.01'32.2'20.27'10.75'36.32'1 1 . 0 5 ' 6 1 . 9 9 ' 9. 1 8 ' 5 3 . 9 8 ' 1 0 ' 5 4 . 0 8 ' 1 1 ' 2 6 . 9 3 ' 1 0 ' 3 6 . 1 ' 1 7 . 7 '16.91'18.17'2 0 . 2 1 ' 4 5 . 1 4 ' 8' 4 5 . 1 4 ' 2 0 . 2 1 ' 1 9 . 7 1 ' 6 3 . 9 ' 9. 7 5 ' 6 3 . 6 6 ' 2 5 . 3 4 '10.01'16.91'17.05'16.85'17.05'9' 9' 9' 9' 9' 9'16.91'17.17'16.89'16.9'14.76'30'32.42'25.31'20.22'63.19'23.86'29.85'21.25'348.35348.10347.73347.03345.97348.05347.73347.73347.73348.90347.00346.05344.35345.00344.65347.73345.97347.03347.73GRADEBREAK348.50348.50344.70344.50345.09347.65348.10348.506" PVC ROOF DRAINTO TRENCHINSTALL CONTECH TREATMENTMANHOLE WITH (5) CARTRIDGESPER DETAIL SHEET 6RIM 344.45FL (IN) 341.351 9 . 4 8 ' 1 8 . 9 5 'INSTALL 20'X70'X4' GRAVEL INFILTRATIONTRENCH WITH 3/4" TO 1-1/2"CRUSHED WASHED ROCK AND (2) 12" PERFHDPE PIPE LAID FLAT PER DETAIL SHEET 6INSTALL TYPE 1 CBRIM 346.05FL346.05INSTALL TYPE 1 CBRIM 344.35FL341.35INSTALL TYPE 1 CBRIM 345.09FL 342.096" CSBCCOMPACTED SUB GRAVEL2" CSTC2" HMACLAYOUT PLAN3 0SCALE:1" = 20'2040THE LAND DEVELOPER'S ENGINEERED SOLUTION 5737 LINDERSON WAY SW, TUMWATER, WA. 98501 PO BOX 4420, TUMWATER, WA. 98501 (360) 890-4806 E-MAIL: erik@thelanddeveloper.com THE LAND DEVELOPER, INC.a division of PROJECT: CLIENT: FARRELLIS BLACKROCK 813 W YELM AVE YELM, WA 98597 BLACKROCK INDUSTRIES REVISIONS: DATE:DRAWN BY:DATE:AGENCY NO:SHEET:JOB NO:OF21-120608/02/2021SaGFARRELLIS BLACKROCK NE 1/4, SECTION 24, TOWNSHIP 17 N., RANGE 1 E., W.M.ERI K B AINSWORTHPROFESSIONAL ENGI N EER STAT E OF WASHINGTONREGISTERED09/23/21PROPOSEDBUILDINGPROPOSEDPARKINGPROPOSEDSTORAGEGENERAL NOTES (STREET CONSTRUCTION)1. ALL WORKMANSHIP AND MATERIALS SHALL BE IN ACCORDANCE WITHCITY OF YELM STANDARDS, AND THE MOST CURRENT COPY OF THESTATE OF WASHINGTON STANDARD SPECIFICATIONS FOR ROAD, BRIDGE,AND MUNICIPAL CONSTRUCTION.2. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL TRAFFIC CONTROL INACCORDANCE WITH MUTCD. PRIOR TO DISRUPTION OF ANY TRAFFIC,TRAFFIC CONTROL PLANS SHALL BE PREPARED AND SUBMITTED TO THECITY FOR APPROVAL. NO WORK SHALL COMMENCE UNTIL ALL APPROVEDTRAFFIC CONTROL IS IN PLACE.3. ALL CURB AND GUTTER, STREET GRADES, SIDEWALK GRADES, AND ANYOTHER VERTICAL AND/OR HORIZONTAL ALIGNMENT SHALL BE STAKED BYAN ENGINEERING OR SURVEYING FIRM CAPABLE OF PERFORMING SUCHWORK.4. WHERE NEW ASPHALT JOINS EXISTING, THE EXISTING ASPHALT SHALL BECUT TO A NEAT VERTICAL EDGE AND TACKED WITH ASPHALT EMULSIONTYPE CSS-1 IN ACCORDANCE WITH THE STANDARD SPECIFICATIONS. THENEW ASPHALT SHALL BE FEATHERED BACK OVER EXISTING TO PROVIDEFOR A SEAL AT THE SAW CUT LOCATION AND THE JOINT SEALED WITHGRADE AR-4000W PAVING ASPHALT.5. COMPACTION OF SUBGRADE, ROCK, AND ASPHALT SHALL BE INACCORDANCE WITH THE STANDARD SPECIFICATIONS.6. SUBGRADE INSPECTION SHALL BE PERFORMED BY AN APPROVEDTESTING FIRM AND FORMS SHALL BE INSPECTED FOR LINE AND GRADEBY AN ENGINEER BEFORE POURING CONCRETE.7. CERTIFICATION AS TO CONFORMANCE SHALL BE PROVIDED TO THE CITYPRIOR TO ACCEPTANCE OF WORK.8. THE CONTRACTOR/DEVELOPER SHALL FURNISH AND INSTALL ALLPERMANENT SIGNING.1SIDEWALK DETAILNTS2CURB DETAILNTS4TYP. PAVEMENT SECTIONSCALE: 1" = 5' - 0"CEMENT CONCRETEBARRIER CURB PERDETAIL 2/3SEE STREET DETAIL 4/3 2 0 . 0 2 'WWWWWWCONTROLVALVECONTROLVALVEW S 3 6 ° 2 2 ' 3 5 " W 3 0 2 . 0 2 ' S 3 6 ° 2 6 ' 5 1 " W 2 7 9 . 5 0 'N 53°33'9"W 172.36'N 53°30'7"W 195.55'35034935134834734634634634534534434334234133933834034534 5 S S SSSSSSSSSSSSSSSSSSSSSSS S 34 4 34 3 34 2 34 1 3 4 0 XXXXXXXXXXXX X X X X X X X X X X X X X X X X XXXXXXXXXXXXXXXXXXXXXXXXXXXXUTILITY PLAN4 0SCALE:1" = 20'2040THE LAND DEVELOPER'S ENGINEERED SOLUTION 5737 LINDERSON WAY SW, TUMWATER, WA. 98501 PO BOX 4420, TUMWATER, WA. 98501 (360) 890-4806 E-MAIL: erik@thelanddeveloper.com THE LAND DEVELOPER, INC.a division of PROJECT: CLIENT: FARRELLIS BLACKROCK 813 W YELM AVE YELM, WA 98597 BLACKROCK INDUSTRIES REVISIONS: DATE:DRAWN BY:DATE:AGENCY NO:SHEET:JOB NO:OF21-120608/02/2021SaGFARRELLIS BLACKROCK NE 1/4, SECTION 24, TOWNSHIP 17 N., RANGE 1 E., W.M.ERI K B AINSWORTHPROFESSIONAL ENGI N EER STAT E OF WASHINGTONREGISTERED09/23/21PROPOSEDBUILDINGPROPOSEDPARKINGPROPOSEDSTORAGEEXISTINGSEWERSERVICE TOREMAINEXISTING WATER SERVICEAND IRRIGATION SERVICETO BE RELOCATED TOLANDSCAPE ISLAND WWWWWWW S 3 6 ° 2 2 ' 3 5 " W 3 0 2 . 0 2 ' S 3 6 ° 2 6 ' 5 1 " W 2 7 9 . 5 0 'N 53°33'9"W 172.36'N 53°30'7"W 195.55'35034935134834734634634634534534434334234133933834034534 5COCOCOCO COSDSDSDSDSDSDSDSDSD FOR MAINTENANCE CALL 1.800.338.1122 www.con techE S.c om TM Cle an water s tart s hereSDSDSDSDSDSD SD 2. 2 0 %PROPOSED ASPHALTPARKING LOT2" ASPHALT OVER2" CSTC OVER6" CSBC OVERCOMPACTED SUBGRADEPER DETAIL 4-S3348.35348.10347.73347.03345.97348.05347.73347.73347.73348.90347.00346.05344.35345.00344.65347.73345.97347.03347.73GRADEBREAK348.50348.50344.70344.50345.09347.65348.10348.506" PVC ROOF DRAINTO TRENCHINSTALL CONTECH TREATMENTMANHOLE WITH (5) CARTRIDGESPER DETAIL SHEET 6RIM 344.45FL (IN) 341.35INSTALL 20'X70'X4' GRAVEL INFILTRATIONTRENCH WITH 3/4" TO 1-1/2"CRUSHED WASHED ROCK AND (2) 12" PERFHDPE PIPE LAID FLAT PER DETAIL SHEET 6INSTALL TYPE 1 CBRIM 346.05FL346.05INSTALL TYPE 1 CBRIM 344.35FL341.35INSTALL TYPE 1 CBRIM 345.09FL 342.09GRADING AND DRAINAGE PLAN5 0SCALE:1" = 20'2040THE LAND DEVELOPER'S ENGINEERED SOLUTION 5737 LINDERSON WAY SW, TUMWATER, WA. 98501 PO BOX 4420, TUMWATER, WA. 98501 (360) 890-4806 E-MAIL: erik@thelanddeveloper.com THE LAND DEVELOPER, INC.a division of PROJECT: CLIENT: FARRELLIS BLACKROCK 813 W YELM AVE YELM, WA 98597 BLACKROCK INDUSTRIES REVISIONS: DATE:DRAWN BY:DATE:AGENCY NO:SHEET:JOB NO:OF21-120608/02/2021SaGFARRELLIS BLACKROCK NE 1/4, SECTION 24, TOWNSHIP 17 N., RANGE 1 E., W.M.ERI K B AINSWORTHPROFESSIONAL ENGI N EER STAT E OF WASHINGTONREGISTERED09/23/21PROPOSEDBUILDINGFF 349.00PROPOSEDPARKINGPROPOSEDSTORAGEFF 345.50GRADING & DRAINAGE PLAN20.00'7 0 . 0 0 '137LF 8" HDPE @ 1.0%166LF 8" HDPE @ 1.0%61LF 12" HDPE @ 1.0%61LF 6" HDPE @ 1.0% 20'4" PERVIOUS ASPHALTOVER 8" OF CRUSHED WASHEDDRAIN ROCK BASE COURSEOVER 66" OF 3/4" TO 1-1/2"FRACTURED ROCKOVER SUBGRADEBOT TRENCHFF 339.50TYPICAL PAVEMENT &INFILTRATION TRENCH SECTIONNOTE:DRAIN ROCK TRENCH SHALLBEAR ON CLEAN SANDYGRAVEL, VERIFY WITHGEOTECH PRIOR TO BACKFILL1'(2)8" DIA PERFHDPE LAID FLATFL 340.50INSTALL FILTERFABRIC ON TOPAND SIDESNOT TO SCALETYPICAL PAVEMENT SECTION4.5'GRADING AND DRAINAGE PLAN6 THE LAND DEVELOPER'S ENGINEERED SOLUTION 5737 LINDERSON WAY SW, TUMWATER, WA. 98501 PO BOX 4420, TUMWATER, WA. 98501 (360) 890-4806 E-MAIL: erik@thelanddeveloper.com THE LAND DEVELOPER, INC.a division of PROJECT: CLIENT: FARRELLIS BLACKROCK 813 W YELM AVE YELM, WA 98597 BLACKROCK INDUSTRIES REVISIONS: DATE:DRAWN BY:DATE:AGENCY NO:SHEET:JOB NO:OF21-120608/02/2021SaGFARRELLIS BLACKROCK NE 1/4, SECTION 24, TOWNSHIP 17 N., RANGE 1 E., W.M.ERI K B AINSWORTHPROFESSIONAL ENGI N EER STAT E OF WASHINGTONREGISTERED09/23/21 WWWWWWW S 3 6 ° 2 2 ' 3 5 " W 3 0 2 . 0 2 ' S 3 6 ° 2 6 ' 5 1 " W 2 7 9 . 5 0 'N 53°33'9"W 172.36'N 53°30'7"W 195.55'35034935134834734634634634534534434334234133933834034534 5 34 4 34 3 34 2 34 1 3 4 0 XXXXXXXXXXXX X X X X X X X X X X X X X X X X XXXXXXXXXXXXXXXXXXXXXXXXXXXXCOCOCOCOCOSDSDSDSDSDSDSDSDSD FOR MAI NTENANCE CAL L 1.800.338.1122 www.cont echES .comTMClea n wat er st arts hereSDSDSDSDSDSD SD LIGHTING PLAN7 0SCALE:1" = 20'2040THE LAND DEVELOPER'S ENGINEERED SOLUTION 5737 LINDERSON WAY SW, TUMWATER, WA. 98501 PO BOX 4420, TUMWATER, WA. 98501 (360) 890-4806 E-MAIL: erik@thelanddeveloper.com THE LAND DEVELOPER, INC.a division of PROJECT: CLIENT: FARRELLIS BLACKROCK 813 W YELM AVE YELM, WA 98597 BLACKROCK INDUSTRIES REVISIONS: DATE:DRAWN BY:DATE:AGENCY NO:SHEET:JOB NO:OF21-120608/02/2021SaGFARRELLIS BLACKROCK NE 1/4, SECTION 24, TOWNSHIP 17 N., RANGE 1 E., W.M.ERI K B AINSWORTHPROFESSIONAL ENGI N EER STAT E OF WASHINGTONREGISTERED09/23/21PROPOSEDBUILDINGPROPOSEDPARKINGPROPOSEDSTORAGE LOCATIONS OF LITHONIA OLW 23WALL PACK LIGHT (VERIFY WITHLIGHTING SUPPLIER PARKING LOTBRIGHTNESS PRIOR TOINSTALLING LIGHTS.)OLW23 LOCATION OF DSX0 LED P1 40KT5M MVOLT HS DUAL HEAD(VERIFY WITH LIGHTING SUPPLIERPARKING LOT BRIGHTNESS PRIORTO INSTALLING LIGHTS.)APPROX 0.1 FOOTCANDLE LINEAPPROX 1.0 FOOTCANDLE LINEAPPROX 0.5 FOOTCANDLE LINE1LIGHT POLE BASE DETAILNTSOLW23APPROX 0.5 FOOTCANDLE LINE Farrelli’s Yelm September 23, 2021 APPENDIX B – Soils Report • BECAUSE RESULTS MATTER • PO Box 4420, Tumwater, WA, 98501 • (360) 250-3973 • email: erik@thelanddeveloper.com DEVELOPER’S THE LAND THE LAND DEVELOPER, Inc. ENGINEERED SOLUTION a division of September 23, 2021 Amber Hodges Project Manager Blackrock Industries 1106 39th Ave SE Puyallup, WA 98374 Re: Farrelli’s Soils Report for Design Infiltration Rates Site Address: 813 W Yelm Avenue, Yelm, Washington 98597 Parcel Number: 21724130700 Dear Ms. Hodges: At your request, I have prepared this soils report. A site visit was performed on 8/9/21 to assess site conditions. The subject site consists of a previously developed lot with an existing restaurant and small parking lot on the east half of the parcel. The surrounding area consists of commercial properties. The lot is located on the west side of Yelm Highway. The site topography is generally sloping from the east to west. The approximately 1.61 acre (Per Thurston County Assessor data) property is vegetated with grass. The United States Natural Resource Conservation Service maps the soils in the area as Spanaway gravelly sandy loam. These soils are listed as Type A soils. No groundwater or mottling was observed in any of the test pits. The project is not located in an aquifer recharge area or a wellhead protection area as defined by the Grays Harbor County Health Department, the EPA or by the county. There are no known ravines, or wetlands located on the site. There are no known basin plans for the area. Refer to the attachments for applicable Soils Maps. The Washington Geologic Information Portal lists the onsite soils as the following: GEOLOGIC_UNIT_LABEL:Qgd GEOLOGIC_UNIT_DESC:Pleistocene till and outwash clay, silt, sand, gravel, cobbles, and boulders deposited by or originating from continental glaciers; locally includes peat, nonglacial sediments, modified land, and artificial fill. GEOLOGIC_UNIT_POLY_500K_ID:14608 GEOLOGIC_AGE:Quaternary (Pleistocene) Re: Farrelli’s Soils Report for Design Infiltration Rates Site Address: 813 W Yelm Avenue, Yelm, Washington 98597 Parcel Number: 21724130700 September 23, 2021 Page 2 PO Box 4420, Tumwater, WA, 98501 • (360) 250-3973 • email: erik@thelanddeveloper.com Each of the test pits were observed to determine soil infiltration feasibility. It appeared to have soils consistent with USDA soils maps. There did not appear to be groundwater or mottling for the depth of the test pit. Based upon the attached sieve tests the soils worst case soils that were encountered was consistent with a gravel with sand soil type. Based upon Method 2 Soil Property Relationships Method an infiltration rate of 20 inches per hour and a design infiltration rate of 10 inches per hour should be used for an infiltration design for project. Once again, thank you for the opportunity to work with you on this project. Please feel free to give me a call if you have any questions. Sincerely, The Land Developer, Inc. Erik B. Ainsworth, PE President Attachments: SCS Soils Map Site plan with soil logs Sieve Reports 20 . 0 2 ' S 3 6 ° 2 2 ' 3 5 " W 3 0 2 . 0 2 ' S 3 6 ° 2 6 ' 5 1 " W 2 7 9 . 5 0 'N 53°33'9"W 172.36'N 53°30'7"W 195.55'35034935134834734634634634534534434334234133933834034534 5 34 434 334 234 1 34 0 10SCALE:1" = 40'4080THE LAND DEVELOPER'S ENGINEERED SOLUTION 5737 LINDERSON WAY SW, TUMWATER, WA. 98501 PO BOX 4420, TUMWATER, WA. 98501 (360) 890-4806 E-MAIL: erik@thelanddeveloper.com THE LAND DEVELOPER, INCa division of ERI K B AINSWORTHPROFESSIONAL ENGI N EER STA T E OF WASHINGTONREGISTERED09/23/21FARRELLIS BLACKROCK 813 W YELM AVE YELM, WA 98597 BLACKROCK INDUSTRIESSHEET OFPROJECT: CLIENT: DATE:PROJECT NUMBER:109/23/21 20-139 FARRELLIS BLACKROCK1107 VINE AVE SW. OLYMPIA, WA 98502TP #2TP #3TP #1 Soil Map—Thurston County Area, Washington Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 9/23/2021 Page 1 of 351993005199330519936051993905199420519945051994805199300519933051993605199390519942051994505199480528990529020529050529080529110529140529170529200529230529260 528990 529020 529050 529080 529110 529140 529170 529200 529230 529260 46° 56' 53'' N 122° 37' 9'' W46° 56' 53'' N122° 36' 55'' W46° 56' 47'' N 122° 37' 9'' W46° 56' 47'' N 122° 36' 55'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 50 100 200 300 Feet 0 20 40 80 120 Meters Map Scale: 1:1,380 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Thurston County Area, Washington Survey Area Data: Version 14, Jun 4, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Jul 18, 2020—Jul 20, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—Thurston County Area, Washington Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 9/23/2021 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 110 Spanaway gravelly sandy loam, 0 to 3 percent slopes 3.9 54.3% 112 Spanaway stony sandy loam, 0 to 3 percent slopes 3.3 45.7% Totals for Area of Interest 7.3 100.0% Soil Map—Thurston County Area, Washington Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 9/23/2021 Page 3 of 3 Sources: Esri, HERE,Garmin, USGS, Intermap,INCREMENT P, NRCan,Esri Japan, METI, Esri Geology Portal N 1 0 0.09 0.180.045 Miles 500k Surface Ge ology Geologic Units 500K Qd, Holocene dune sand Qa, Quaternary alluvium Qls, Quaternary mass-wasting deposits Ql, Quaternary loess Qf, Pleistocene outburst-flood deposits Qgd, Pleistocene continental glacial drift Qad, Pleistocene alpine glacial drift QTc, Quaternary-Tertiary continental sedimentary rocks and deposits Tc, Tertiary continental sedimentary rocks MZc, Mesozoic continental sedimentary rocks Tn, Tertiary nearshore sedimentary rocks MZn, Mesozoic nearshore sedimentary rocks Tm, Tertiary marine sedimentary rocks MZm, Mesozoic marine sedimentary rocks Qv, Quaternary volcanic rocks QTv, Quaternary-Tertiary volcanic rocks Tv(cr), Tertiary volcanic rocks, Columbia River Basalt Group Tv, Tertiary volcanic rocks Tv(c), Tertiary volcanic rocks, Crescent Formation MZv, Mesozoic volcanic rocks Qvt, Quaternary fragmental volcanic rocks and deposits (includes lahars) Tvt, Tertiary fragmental volcanic rocks Qi, Quaternary intrusive rocks QTi, Quaternary-Tertiary intrusive rocks Ti, Tertiary intrusive rocks TKi, Tertiary-Cretaceous intrusive rocks Project:Project Number:Client:Test Pit No. Farrelli’s Yelm 21-120 Blackrock Industries 1 Address, City, State Excavator pit test Logged By:Started: EBA 10AM Weather:Completed: Overcast and light rain 11PM Backfilled: YES Groundwater Depth:Elevation:Total Depth of test pit: None observed 8 FT Lithology Brown topsoil with roots Brown Medium Dense Poorly graded Gravel with sand GP 1 Bulk/ Bag Sample End test pit @ 8 ft, No groundwater or mottling observed Civil Engineering Boring Log: Sheet __of ___ Standard Penetration Slit Spoon Sampler (SPT) California Sampler StabIlized Ground water Shelby Tube Groundwater At time of Drilling CPP Sampler Bulk/ Bag Sample Parcels 21724130700 Dry Density (pcf)Moisture Content (%)Additional TestSoil Group Name: modifier, color, moisture, density/consistency, grain size, other descriptors Rock Description: modifierm color, hardness/degree of concentration, bedding and joint characteristics, solutions, void conditions.DateDepth (feet)Sample TypeSample NumberBlow Counts (blows/foot)Graphic Log5 10 Project:Project Number:Client:Test Pit No. Farrelli’s Yelm 21-120 Blackrock Industries 2 Address, City, State Excavator pit test Logged By:Started: EBA 10AM Weather:Completed: Overcast and light rain 11PM Backfilled: YES Groundwater Depth:Elevation:Total Depth of test pit: None observed 8 FT Lithology Brown topsoil with roots Brown Medium Dense Poorly graded Gravel with sand GP 1 Bulk/ Bag Sample End test pit @ 8 ft, No groundwater or mottling observed Civil Engineering Boring Log: Sheet __of ___ Standard Penetration Slit Spoon Sampler (SPT) California Sampler StabIlized Ground water Shelby Tube Groundwater At time of Drilling CPP Sampler Bulk/ Bag Sample Parcels 21724130700 Dry Density (pcf)Moisture Content (%)Additional TestSoil Group Name: modifier, color, moisture, density/consistency, grain size, other descriptors Rock Description: modifierm color, hardness/degree of concentration, bedding and joint characteristics, solutions, void conditions.DateDepth (feet)Sample TypeSample NumberBlow Counts (blows/foot)Graphic Log5 10 Project:Project Number:Client:Test Pit No. Farrelli’s Yelm 21-120 Blackrock Industries 3 Address, City, State Excavator pit test Logged By:Started: EBA 10AM Weather:Completed: Overcast and light rain 11PM Backfilled: YES Groundwater Depth:Elevation:Total Depth of test pit: None observed 8 FT Lithology Brown topsoil with roots Brown Medium Dense Poorly graded Gravel with sand & silt GP-GM 1 Bulk/ Bag Sample End test pit @ 8 ft, No groundwater or mottling observed Civil Engineering Boring Log: Sheet __of ___ Standard Penetration Slit Spoon Sampler (SPT) California Sampler StabIlized Ground water Shelby Tube Groundwater At time of Drilling CPP Sampler Bulk/ Bag Sample Parcels 21724130700 Dry Density (pcf)Moisture Content (%)Additional TestSoil Group Name: modifier, color, moisture, density/consistency, grain size, other descriptors Rock Description: modifierm color, hardness/degree of concentration, bedding and joint characteristics, solutions, void conditions.DateDepth (feet)Sample TypeSample NumberBlow Counts (blows/foot)Graphic Log5 10 Project:Date Received:18-Aug-21 Project #:Sampled By:Client Client:Date Tested:20-Aug-21 Source:Tested By:K. Mendez Sample#:B21-1469 D(5) =0.094 mm % Gravel =56.3%Coeff. of Curvature, CC =0.53 Specifications D(10) =0.259 mm % Sand =39.2%Coeff. of Uniformity, CU =58.72 No Specs D(15) =0.408 mm % Silt & Clay =4.6%Fineness Modulus =5.55 Sample Meets Specs ?N/A D(30) =1.446 mm Liquid Limit =n/a Plastic Limit =n/a D(50) =8.360 mm Plasticity Index =n/a Moisture %, as sampled =4.9% D(60) =15.216 mm Sand Equivalent =n/a Req'd Sand Equivalent = D(90) =59.306 mm Fracture %, 1 Face =n/a Req'd Fracture %, 1 Face = Dust Ratio =29/99 Fracture %, 2+ Faces =n/a Req'd Fracture %, 2+ Faces = Actual Interpolated Cumulative Cumulative Sieve Size Percent Percent Specs Specs US Metric Passing Passing Max Min 12.00"300.00 100%100.0%0.0% 10.00"250.00 100%100.0%0.0% 8.00"200.00 100%100.0%0.0% 6.00"150.00 100%100.0%0.0% 4.00"100.00 100%100.0%0.0% 3.00"75.00 100%100%100.0%0.0% 2.50"63.00 92%100.0%0.0% 2.00"50.00 84%84%100.0%0.0% 1.75"45.00 82%100.0%0.0% 1.50"37.50 78%100.0%0.0% 1.25"31.50 75%100.0%0.0% 1.00"25.00 71%71%100.0%0.0% 3/4"19.00 65%65%100.0%0.0% 5/8"16.00 61%100.0%0.0% 1/2"12.50 57%57%100.0%0.0% 3/8"9.50 52%52%100.0%0.0% 1/4"6.30 46%100.0%0.0% #4 4.75 44%44%100.0%0.0% #8 2.36 39%100.0%0.0% #10 2.00 38%38%100.0%0.0% #16 1.18 26%100.0%0.0% #20 0.850 22%100.0%0.0% #30 0.600 18%100.0%0.0% #40 0.425 16%16%100.0%0.0% #50 0.300 11%100.0%0.0% #60 0.250 10%100.0%0.0% #80 0.180 7%100.0%0.0% #100 0.150 6%6%100.0%0.0% #140 0.106 5%100.0%0.0% #170 0.090 5%100.0%0.0% #200 0.075 4.6%4.6%100.0%0.0% Copyright Spears Engineering & Technical Services PS, 1996-98 Comments: Reviewed by: Meghan Blodgett-Carrillo All results apply only to actual locations and materials tested. As a mutual protection to clients, the public and ourselves, all reports are submitted as the confidential property of clients, and authorization for publication of statements, conclusions or extracts from or regarding our reports is reserved pending our written approval. Sieve Report ASTM C136, ASTM D6913, ASTM C117 21S108 The Land Developers Q.C. - The Land Developers 2021 Unified Soil Classification System, ASTM-2487 Yelm Ferellis TP1 SL#1 @ 4 ft ASTM D2216, ASTM D2419, ASTM D4318, ASTM D5281 GP, Poorly graded Gravel with Sand brown Sample Color:8"6"4"2"3"1½"1¼"10"1"¾"5/8"½"3/8"¼"#4#8#10#16#20#30#40#50#60#80#100#140#170#2000% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0.0% 10.0% 20.0% 30.0% 40.0% 50.0% 60.0% 70.0% 80.0% 90.0% 100.0% 0.0010.0100.1001.00010.000100.000% Passing% PassingParticle Size (mm) Grain Size Distribution Sieve Sizes Max Specs Min Specs Sieve Results Environmental ● Geotechnical Engineering ● Special Inspection ● Non-Destructive Testing ● Materials Testing Burlington | Olympia | Bellingham | Silverdale | Tukwila 360.755.1990 www.mtc-inc.net Project:Date Received:18-Aug-21 Project #:Sampled By:Client Client:Date Tested:20-Aug-21 Source:Tested By:K. Mendez Sample#:B21-1470 D(5) =0.090 mm % Gravel =65.7%Coeff. of Curvature, CC =0.55 Specifications D(10) =0.268 mm % Sand =29.7%Coeff. of Uniformity, CU =91.84 No Specs D(15) =0.456 mm % Silt & Clay =4.6%Fineness Modulus =6.04 Sample Meets Specs ?N/A D(30) =1.908 mm Liquid Limit =n/a Plastic Limit =n/a D(50) =19.924 mm Plasticity Index =n/a Moisture %, as sampled =2.0% D(60) =24.613 mm Sand Equivalent =n/a Req'd Sand Equivalent = D(90) =53.897 mm Fracture %, 1 Face =n/a Req'd Fracture %, 1 Face = Dust Ratio =29/92 Fracture %, 2+ Faces =n/a Req'd Fracture %, 2+ Faces = Actual Interpolated Cumulative Cumulative Sieve Size Percent Percent Specs Specs US Metric Passing Passing Max Min 12.00"300.00 100%100.0%0.0% 10.00"250.00 100%100.0%0.0% 8.00"200.00 100%100.0%0.0% 6.00"150.00 100%100.0%0.0% 4.00"100.00 100%100.0%0.0% 3.00"75.00 100%100%100.0%0.0% 2.50"63.00 94%100.0%0.0% 2.00"50.00 88%88%100.0%0.0% 1.75"45.00 83%100.0%0.0% 1.50"37.50 74%100.0%0.0% 1.25"31.50 68%100.0%0.0% 1.00"25.00 61%61%100.0%0.0% 3/4"19.00 48%48%100.0%0.0% 5/8"16.00 44%100.0%0.0% 1/2"12.50 40%40%100.0%0.0% 3/8"9.50 38%38%100.0%0.0% 1/4"6.30 35%100.0%0.0% #4 4.75 34%34%100.0%0.0% #8 2.36 31%100.0%0.0% #10 2.00 31%31%100.0%0.0% #16 1.18 22%100.0%0.0% #20 0.850 19%100.0%0.0% #30 0.600 16%100.0%0.0% #40 0.425 15%15%100.0%0.0% #50 0.300 11%100.0%0.0% #60 0.250 9%100.0%0.0% #80 0.180 7%100.0%0.0% #100 0.150 6%6%100.0%0.0% #140 0.106 5%100.0%0.0% #170 0.090 5%100.0%0.0% #200 0.075 4.6%4.6%100.0%0.0% Copyright Spears Engineering & Technical Services PS, 1996-98 Comments: Reviewed by: Meghan Blodgett-Carrillo Sieve Report ASTM C136, ASTM D6913, ASTM C117 21S108 The Land Developers Q.C. - The Land Developers 2021 Unified Soil Classification System, ASTM-2487 Yelm Ferellis TP2 SL#2 @ 4 ft ASTM D2216, ASTM D2419, ASTM D4318, ASTM D5281 GP, Poorly graded Gravel with Sand brown Sample Color: All results apply only to actual locations and materials tested. As a mutual protection to clients, the public and ourselves, all reports are submitted as the confidential property of clients, and authorization for publication of statements, conclusions or extracts from or regarding our reports is reserved pending our written approval.8"6"4"2"3"1½"1¼"10"1"¾"5/8"½"3/8"¼"#4#8#10#16#20#30#40#50#60#80#100#140#170#2000% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0.0% 10.0% 20.0% 30.0% 40.0% 50.0% 60.0% 70.0% 80.0% 90.0% 100.0% 0.0010.0100.1001.00010.000100.000% Passing% PassingParticle Size (mm) Grain Size Distribution Sieve Sizes Max Specs Min Specs Sieve Results Environmental ● Geotechnical Engineering ● Special Inspection ● Non-Destructive Testing ● Materials Testing Burlington | Olympia | Bellingham | Silverdale | Tukwila 360.755.1990 www.mtc-inc.net Project:Date Received:18-Aug-21 Project #:Sampled By:Client Client:Date Tested:20-Aug-21 Source:Tested By:K. Mendez Sample#:B21-1471 D(5) =0.074 mm % Gravel =48.8%Coeff. of Curvature, CC =0.19 Specifications D(10) =0.196 mm % Sand =46.2%Coeff. of Uniformity, CU =81.72 No Specs D(15) =0.274 mm % Silt & Clay =5.1%Fineness Modulus =5.01 Sample Meets Specs ?N/A D(30) =0.772 mm Liquid Limit =n/a Plastic Limit =n/a D(50) =3.209 mm Plasticity Index =n/a Moisture %, as sampled =4.1% D(60) =15.989 mm Sand Equivalent =n/a Req'd Sand Equivalent = D(90) =46.157 mm Fracture %, 1 Face =n/a Req'd Fracture %, 1 Face = Dust Ratio =6/29 Fracture %, 2+ Faces =n/a Req'd Fracture %, 2+ Faces = Actual Interpolated Cumulative Cumulative Sieve Size Percent Percent Specs Specs US Metric Passing Passing Max Min 12.00"300.00 100%100.0%0.0% 10.00"250.00 100%100.0%0.0% 8.00"200.00 100%100.0%0.0% 6.00"150.00 100%100.0%0.0% 4.00"100.00 100%100.0%0.0% 3.00"75.00 100%100%100.0%0.0% 2.50"63.00 97%100.0%0.0% 2.00"50.00 94%94%100.0%0.0% 1.75"45.00 89%100.0%0.0% 1.50"37.50 82%100.0%0.0% 1.25"31.50 76%100.0%0.0% 1.00"25.00 70%70%100.0%0.0% 3/4"19.00 63%63%100.0%0.0% 5/8"16.00 60%100.0%0.0% 1/2"12.50 57%57%100.0%0.0% 3/8"9.50 54%54%100.0%0.0% 1/4"6.30 52%100.0%0.0% #4 4.75 51%51%100.0%0.0% #8 2.36 49%100.0%0.0% #10 2.00 49%49%100.0%0.0% #16 1.18 36%100.0%0.0% #20 0.850 31%100.0%0.0% #30 0.600 27%100.0%0.0% #40 0.425 25%25%100.0%0.0% #50 0.300 17%100.0%0.0% #60 0.250 13%100.0%0.0% #80 0.180 9%100.0%0.0% #100 0.150 7%7%100.0%0.0% #140 0.106 6%100.0%0.0% #170 0.090 5%100.0%0.0% #200 0.075 5.1%5.1%100.0%0.0% Copyright Spears Engineering & Technical Services PS, 1996-98 Comments: Reviewed by: Meghan Blodgett-Carrillo All results apply only to actual locations and materials tested. As a mutual protection to clients, the public and ourselves, all reports are submitted as the confidential property of clients, and authorization for publication of statements, conclusions or extracts from or regarding our reports is reserved pending our written approval. Sieve Report ASTM C136, ASTM D6913, ASTM C117 21S108 The Land Developers Q.C. - The Land Developers 2021 Unified Soil Classification System, ASTM-2487 Yelm Ferellis TP3 SL#3 @ 5 ft ASTM D2216, ASTM D2419, ASTM D4318, ASTM D5281 GP-GM, Poorly graded Gravel with Silt and Sand brown Sample Color:8"6"4"2"3"1½"1¼"10"1"¾"5/8"½"3/8"¼"#4#8#10#16#20#30#40#50#60#80#100#140#170#2000% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 0.0% 10.0% 20.0% 30.0% 40.0% 50.0% 60.0% 70.0% 80.0% 90.0% 100.0% 0.0010.0100.1001.00010.000100.000% Passing% PassingParticle Size (mm) Grain Size Distribution Sieve Sizes Max Specs Min Specs Sieve Results Environmental ● Geotechnical Engineering ● Special Inspection ● Non-Destructive Testing ● Materials Testing Burlington | Olympia | Bellingham | Silverdale | Tukwila 360.755.1990 www.mtc-inc.net Farrelli’s Yelm September 23, 2021 APPENDIX C – WWHM Analysis WWHM2012 PROJECT REPORT ___________________________________________________________________ Project Name: 21-120-p-lot1 Site Name: Site Address: City : Report Date: 9/1/2021 Gage : Lake Lawrence Data Start : 1955/10/01 Data End : 2008/09/30 Precip Scale: 0.86 Version Date: 2019/09/13 Version : 4.2.17 ___________________________________________________________________ Low Flow Threshold for POC 1 : 50 Percent of the 2 Year ___________________________________________________________________ High Flow Threshold for POC 1: 50 year ___________________________________________________________________ PREDEVELOPED LAND USE Name : Basin 1 Bypass: No GroundWater: No Pervious Land Use acre A B, Forest, Flat 1.35 Pervious Total 1.35 Impervious Land Use acre Impervious Total 0 Basin Total 1.35 ___________________________________________________________________ Element Flows To: Surface Interflow Groundwater ___________________________________________________________________ MITIGATED LAND USE Name : Basin 1 Bypass: No GroundWater: No Pervious Land Use acre C, Pasture, Flat .5 Pervious Total 0.5 Impervious Land Use acre ROADS FLAT 0.75 ROOF TOPS FLAT 0.1 Impervious Total 0.85 Basin Total 1.35 ___________________________________________________________________ Element Flows To: Surface Interflow Groundwater Gravel Trench Bed 1 Gravel Trench Bed 1 ___________________________________________________________________ Name : Gravel Trench Bed 1 Bottom Length: 70.00 ft. Bottom Width: 20.00 ft. Trench bottom slope 1: 0 To 1 Trench Left side slope 0: 0 To 1 Trench right side slope 2: 0 To 1 Material thickness of first layer: 4 Pour Space of material for first layer: 0.35 Material thickness of second layer: 0 Pour Space of material for second layer: 0 Material thickness of third layer: 0 Pour Space of material for third layer: 0 Infiltration On Infiltration rate: 10 Infiltration safety factor: 1 Wetted surface area On Total Volume Infiltrated (ac-ft.): 184.382 Total Volume Through Riser (ac-ft.): 0 Total Volume Through Facility (ac-ft.): 184.382 Percent Infiltrated: 100 Total Precip Applied to Facility: 0 Total Evap From Facility: 0 Discharge Structure Riser Height: 5 ft. Riser Diameter: 8 in. Element Flows To: Outlet 1 Outlet 2 ___________________________________________________________________ Gravel Trench Bed Hydraulic Table Stage(feet) Area(ac.) Volume(ac-ft.) Discharge(cfs) Infilt(cfs) 0.0000 0.032 0.000 0.000 0.000 0.0667 0.032 0.000 0.000 0.324 0.1333 0.032 0.001 0.000 0.324 0.2000 0.032 0.002 0.000 0.324 0.2667 0.032 0.003 0.000 0.324 0.3333 0.032 0.003 0.000 0.324 0.4000 0.032 0.004 0.000 0.324 0.4667 0.032 0.005 0.000 0.324 0.5333 0.032 0.006 0.000 0.324 0.6000 0.032 0.006 0.000 0.324 0.6667 0.032 0.007 0.000 0.324 0.7333 0.032 0.008 0.000 0.324 0.8000 0.032 0.009 0.000 0.324 0.8667 0.032 0.009 0.000 0.324 0.9333 0.032 0.010 0.000 0.324 1.0000 0.032 0.011 0.000 0.324 1.0667 0.032 0.012 0.000 0.324 1.1333 0.032 0.012 0.000 0.324 1.2000 0.032 0.013 0.000 0.324 1.2667 0.032 0.014 0.000 0.324 1.3333 0.032 0.015 0.000 0.324 1.4000 0.032 0.015 0.000 0.324 1.4667 0.032 0.016 0.000 0.324 1.5333 0.032 0.017 0.000 0.324 1.6000 0.032 0.018 0.000 0.324 1.6667 0.032 0.018 0.000 0.324 1.7333 0.032 0.019 0.000 0.324 1.8000 0.032 0.020 0.000 0.324 1.8667 0.032 0.021 0.000 0.324 1.9333 0.032 0.021 0.000 0.324 2.0000 0.032 0.022 0.000 0.324 2.0667 0.032 0.023 0.000 0.324 2.1333 0.032 0.024 0.000 0.324 2.2000 0.032 0.024 0.000 0.324 2.2667 0.032 0.025 0.000 0.324 2.3333 0.032 0.026 0.000 0.324 2.4000 0.032 0.027 0.000 0.324 2.4667 0.032 0.027 0.000 0.324 2.5333 0.032 0.028 0.000 0.324 2.6000 0.032 0.029 0.000 0.324 2.6667 0.032 0.030 0.000 0.324 2.7333 0.032 0.030 0.000 0.324 2.8000 0.032 0.031 0.000 0.324 2.8667 0.032 0.032 0.000 0.324 2.9333 0.032 0.033 0.000 0.324 3.0000 0.032 0.033 0.000 0.324 3.0667 0.032 0.034 0.000 0.324 3.1333 0.032 0.035 0.000 0.324 3.2000 0.032 0.036 0.000 0.324 3.2667 0.032 0.036 0.000 0.324 3.3333 0.032 0.037 0.000 0.324 3.4000 0.032 0.038 0.000 0.324 3.4667 0.032 0.039 0.000 0.324 3.5333 0.032 0.039 0.000 0.324 3.6000 0.032 0.040 0.000 0.324 3.6667 0.032 0.041 0.000 0.324 3.7333 0.032 0.042 0.000 0.324 3.8000 0.032 0.042 0.000 0.324 3.8667 0.032 0.043 0.000 0.324 3.9333 0.032 0.044 0.000 0.324 4.0000 0.032 0.046 0.000 0.324 4.0667 0.032 0.048 0.000 0.324 4.1333 0.032 0.050 0.000 0.324 4.2000 0.032 0.052 0.000 0.324 4.2667 0.032 0.055 0.000 0.324 4.3333 0.032 0.057 0.000 0.324 4.4000 0.032 0.059 0.000 0.324 4.4667 0.032 0.061 0.000 0.324 4.5333 0.032 0.063 0.000 0.324 4.6000 0.032 0.065 0.000 0.324 4.6667 0.032 0.067 0.000 0.324 4.7333 0.032 0.070 0.000 0.324 4.8000 0.032 0.072 0.000 0.324 4.8667 0.032 0.074 0.000 0.324 4.9333 0.032 0.076 0.000 0.324 5.0000 0.032 0.078 0.000 0.324 5.0667 0.032 0.080 0.121 0.324 5.1333 0.032 0.082 0.329 0.324 5.2000 0.032 0.085 0.547 0.324 5.2667 0.032 0.087 0.711 0.324 5.3333 0.032 0.089 0.808 0.324 5.4000 0.032 0.091 0.885 0.324 5.4667 0.032 0.093 0.956 0.324 5.5333 0.032 0.095 1.022 0.324 5.6000 0.032 0.097 1.084 0.324 5.6667 0.032 0.100 1.143 0.324 5.7333 0.032 0.102 1.198 0.324 5.8000 0.032 0.104 1.252 0.324 5.8667 0.032 0.106 1.303 0.324 5.9333 0.032 0.108 1.352 0.324 6.0000 0.032 0.110 1.399 0.324 ___________________________________________________________________ ___________________________________________________________________ ANALYSIS RESULTS Stream Protection Duration ___________________________________________________________________ Predeveloped Landuse Totals for POC #1 Total Pervious Area:1.35 Total Impervious Area:0 ___________________________________________________________________ Mitigated Landuse Totals for POC #1 Total Pervious Area:0.5 Total Impervious Area:0.85 ___________________________________________________________________ Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.002048 5 year 0.005682 10 year 0.010476 25 year 0.021394 50 year 0.035128 100 year 0.056191 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0 5 year 0 10 year 0 25 year 0 50 year 0 100 year 0 ___________________________________________________________________ Stream Protection Duration Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1956 0.007 0.000 1957 0.002 0.000 1958 0.001 0.000 1959 0.001 0.000 1960 0.001 0.000 1961 0.005 0.000 1962 0.001 0.000 1963 0.001 0.000 1964 0.001 0.000 1965 0.001 0.000 1966 0.001 0.000 1967 0.002 0.000 1968 0.001 0.000 1969 0.001 0.000 1970 0.001 0.000 1971 0.009 0.000 1972 0.014 0.000 1973 0.001 0.000 1974 0.004 0.000 1975 0.001 0.000 1976 0.002 0.000 1977 0.001 0.000 1978 0.001 0.000 1979 0.001 0.000 1980 0.001 0.000 1981 0.003 0.000 1982 0.003 0.000 1983 0.001 0.000 1984 0.001 0.000 1985 0.001 0.000 1986 0.003 0.000 1987 0.002 0.000 1988 0.001 0.000 1989 0.001 0.000 1990 0.008 0.000 1991 0.012 0.000 1992 0.001 0.000 1993 0.001 0.000 1994 0.001 0.000 1995 0.007 0.000 1996 0.016 0.000 1997 0.011 0.000 1998 0.003 0.000 1999 0.001 0.000 2000 0.001 0.000 2001 0.001 0.000 2002 0.007 0.000 2003 0.001 0.000 2004 0.068 0.000 2005 0.011 0.000 2006 0.049 0.000 2007 0.021 0.000 2008 0.001 0.000 ___________________________________________________________________ Stream Protection Duration Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.0683 0.0000 2 0.0491 0.0000 3 0.0212 0.0000 4 0.0163 0.0000 5 0.0143 0.0000 6 0.0117 0.0000 7 0.0110 0.0000 8 0.0108 0.0000 9 0.0088 0.0000 10 0.0077 0.0000 11 0.0069 0.0000 12 0.0067 0.0000 13 0.0067 0.0000 14 0.0048 0.0000 15 0.0037 0.0000 16 0.0028 0.0000 17 0.0026 0.0000 18 0.0025 0.0000 19 0.0025 0.0000 20 0.0023 0.0000 21 0.0018 0.0000 22 0.0015 0.0000 23 0.0015 0.0000 24 0.0015 0.0000 25 0.0011 0.0000 26 0.0011 0.0000 27 0.0011 0.0000 28 0.0011 0.0000 29 0.0011 0.0000 30 0.0011 0.0000 31 0.0011 0.0000 32 0.0011 0.0000 33 0.0011 0.0000 34 0.0011 0.0000 35 0.0011 0.0000 36 0.0011 0.0000 37 0.0011 0.0000 38 0.0011 0.0000 39 0.0011 0.0000 40 0.0011 0.0000 41 0.0011 0.0000 42 0.0011 0.0000 43 0.0011 0.0000 44 0.0011 0.0000 45 0.0011 0.0000 46 0.0011 0.0000 47 0.0011 0.0000 48 0.0010 0.0000 49 0.0010 0.0000 50 0.0010 0.0000 51 0.0010 0.0000 52 0.0010 0.0000 53 0.0010 0.0000 ___________________________________________________________________ Stream Protection Duration POC #1 The Facility PASSED The Facility PASSED. Flow(cfs) Predev Mit Percentage Pass/Fail 0.0010 686 0 0 Pass 0.0014 148 0 0 Pass 0.0017 120 0 0 Pass 0.0021 98 0 0 Pass 0.0024 80 0 0 Pass 0.0027 61 0 0 Pass 0.0031 51 0 0 Pass 0.0034 48 0 0 Pass 0.0038 44 0 0 Pass 0.0041 38 0 0 Pass 0.0045 37 0 0 Pass 0.0048 33 0 0 Pass 0.0052 32 0 0 Pass 0.0055 30 0 0 Pass 0.0058 29 0 0 Pass 0.0062 27 0 0 Pass 0.0065 26 0 0 Pass 0.0069 22 0 0 Pass 0.0072 19 0 0 Pass 0.0076 18 0 0 Pass 0.0079 16 0 0 Pass 0.0083 16 0 0 Pass 0.0086 14 0 0 Pass 0.0089 13 0 0 Pass 0.0093 11 0 0 Pass 0.0096 9 0 0 Pass 0.0100 9 0 0 Pass 0.0103 9 0 0 Pass 0.0107 9 0 0 Pass 0.0110 8 0 0 Pass 0.0114 6 0 0 Pass 0.0117 5 0 0 Pass 0.0120 5 0 0 Pass 0.0124 5 0 0 Pass 0.0127 5 0 0 Pass 0.0131 5 0 0 Pass 0.0134 5 0 0 Pass 0.0138 5 0 0 Pass 0.0141 5 0 0 Pass 0.0145 4 0 0 Pass 0.0148 4 0 0 Pass 0.0151 4 0 0 Pass 0.0155 4 0 0 Pass 0.0158 4 0 0 Pass 0.0162 4 0 0 Pass 0.0165 3 0 0 Pass 0.0169 3 0 0 Pass 0.0172 3 0 0 Pass 0.0176 3 0 0 Pass 0.0179 3 0 0 Pass 0.0182 3 0 0 Pass 0.0186 3 0 0 Pass 0.0189 3 0 0 Pass 0.0193 3 0 0 Pass 0.0196 3 0 0 Pass 0.0200 3 0 0 Pass 0.0203 3 0 0 Pass 0.0207 3 0 0 Pass 0.0210 3 0 0 Pass 0.0213 2 0 0 Pass 0.0217 2 0 0 Pass 0.0220 2 0 0 Pass 0.0224 2 0 0 Pass 0.0227 2 0 0 Pass 0.0231 2 0 0 Pass 0.0234 2 0 0 Pass 0.0238 2 0 0 Pass 0.0241 2 0 0 Pass 0.0244 2 0 0 Pass 0.0248 2 0 0 Pass 0.0251 2 0 0 Pass 0.0255 2 0 0 Pass 0.0258 2 0 0 Pass 0.0262 2 0 0 Pass 0.0265 2 0 0 Pass 0.0269 2 0 0 Pass 0.0272 2 0 0 Pass 0.0275 2 0 0 Pass 0.0279 2 0 0 Pass 0.0282 2 0 0 Pass 0.0286 2 0 0 Pass 0.0289 2 0 0 Pass 0.0293 2 0 0 Pass 0.0296 2 0 0 Pass 0.0300 2 0 0 Pass 0.0303 2 0 0 Pass 0.0306 2 0 0 Pass 0.0310 2 0 0 Pass 0.0313 2 0 0 Pass 0.0317 2 0 0 Pass 0.0320 2 0 0 Pass 0.0324 2 0 0 Pass 0.0327 2 0 0 Pass 0.0331 2 0 0 Pass 0.0334 2 0 0 Pass 0.0338 2 0 0 Pass 0.0341 2 0 0 Pass 0.0344 2 0 0 Pass 0.0348 2 0 0 Pass 0.0351 2 0 0 Pass _____________________________________________________ ___________________________________________________________________ Water Quality BMP Flow and Volume for POC #1 On-line facility volume: 0 acre-feet On-line facility target flow: 0 cfs. Adjusted for 15 min: 0 cfs. Off-line facility target flow: 0 cfs. Adjusted for 15 min: 0 cfs. ___________________________________________________________________ LID Report LID Technique Used for Total Volume Volume Infiltration Cumulative Percent Water Quality Percent Comment Treatment? Needs Through Volume Volume Volume Water Quality Treatment Facility (ac-ft.) Infiltration Infiltrated Treated (ac-ft) (ac-ft) Credit Gravel Trench Bed 1 POC N 167.79 N 100.00 Total Volume Infiltrated 167.79 0.00 0.00 100.00 0.00 0% No Treat. Credit Compliance with LID Standard 8 Duration Analysis Result = Passed ___________________________________________________________________ Perlnd and Implnd Changes No changes have been made. ___________________________________________________________________ This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by : Clear Creek Solutions, Inc. 2005-2021; All Rights Reserved. WWHM2012 PROJECT REPORT ___________________________________________________________________ Project Name: 21-120-p-lot1-treat Site Name: Site Address: City : Report Date: 9/1/2021 Gage : Lake Lawrence Data Start : 1955/10/01 Data End : 2008/09/30 Precip Scale: 0.86 Version Date: 2019/09/13 Version : 4.2.17 ___________________________________________________________________ Low Flow Threshold for POC 1 : 50 Percent of the 2 Year ___________________________________________________________________ High Flow Threshold for POC 1: 50 year ___________________________________________________________________ PREDEVELOPED LAND USE Name : Basin 1 Bypass: No GroundWater: No Pervious Land Use acre A B, Forest, Flat 1.35 Pervious Total 1.35 Impervious Land Use acre Impervious Total 0 Basin Total 1.35 ___________________________________________________________________ Element Flows To: Surface Interflow Groundwater ___________________________________________________________________ MITIGATED LAND USE Name : Basin 1 Bypass: No GroundWater: No Pervious Land Use acre C, Pasture, Flat .5 Pervious Total 0.5 Impervious Land Use acre ROADS FLAT 0.75 ROOF TOPS FLAT 0.1 Impervious Total 0.85 Basin Total 1.35 ___________________________________________________________________ Element Flows To: Surface Interflow Groundwater ___________________________________________________________________ ___________________________________________________________________ ANALYSIS RESULTS Stream Protection Duration ___________________________________________________________________ Predeveloped Landuse Totals for POC #1 Total Pervious Area:1.35 Total Impervious Area:0 ___________________________________________________________________ Mitigated Landuse Totals for POC #1 Total Pervious Area:0.5 Total Impervious Area:0.85 ___________________________________________________________________ Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.002048 5 year 0.005682 10 year 0.010476 25 year 0.021394 50 year 0.035128 100 year 0.056191 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0.377396 5 year 0.528174 10 year 0.641345 25 year 0.8003 50 year 0.930822 100 year 1.072174 ___________________________________________________________________ Stream Protection Duration Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1956 0.007 0.303 1957 0.002 0.590 1958 0.001 0.381 1959 0.001 0.359 1960 0.001 0.537 1961 0.005 0.269 1962 0.001 0.272 1963 0.001 0.520 1964 0.001 0.343 1965 0.001 0.376 1966 0.001 0.295 1967 0.002 0.353 1968 0.001 0.225 1969 0.001 0.240 1970 0.001 0.278 1971 0.009 0.280 1972 0.014 0.356 1973 0.001 0.286 1974 0.004 0.652 1975 0.001 0.387 1976 0.002 0.325 1977 0.001 0.455 1978 0.001 0.368 1979 0.001 0.488 1980 0.001 0.273 1981 0.003 0.481 1982 0.003 0.370 1983 0.001 0.636 1984 0.001 0.361 1985 0.001 0.335 1986 0.003 0.445 1987 0.002 0.351 1988 0.001 0.196 1989 0.001 0.241 1990 0.008 1.028 1991 0.012 0.504 1992 0.001 0.375 1993 0.001 0.212 1994 0.001 0.334 1995 0.007 0.492 1996 0.016 0.442 1997 0.011 0.368 1998 0.003 0.599 1999 0.001 0.326 2000 0.001 0.356 2001 0.001 0.321 2002 0.007 0.381 2003 0.001 0.260 2004 0.068 0.962 2005 0.011 1.160 2006 0.049 0.551 2007 0.021 0.435 2008 0.001 0.564 ___________________________________________________________________ Stream Protection Duration Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.0683 1.1605 2 0.0491 1.0283 3 0.0212 0.9620 4 0.0163 0.6521 5 0.0143 0.6363 6 0.0117 0.5989 7 0.0110 0.5902 8 0.0108 0.5638 9 0.0088 0.5514 10 0.0077 0.5371 11 0.0069 0.5196 12 0.0067 0.5037 13 0.0067 0.4918 14 0.0048 0.4881 15 0.0037 0.4812 16 0.0028 0.4555 17 0.0026 0.4446 18 0.0025 0.4421 19 0.0025 0.4349 20 0.0023 0.3870 21 0.0018 0.3814 22 0.0015 0.3808 23 0.0015 0.3765 24 0.0015 0.3750 25 0.0011 0.3699 26 0.0011 0.3679 27 0.0011 0.3676 28 0.0011 0.3610 29 0.0011 0.3590 30 0.0011 0.3563 31 0.0011 0.3558 32 0.0011 0.3531 33 0.0011 0.3515 34 0.0011 0.3433 35 0.0011 0.3346 36 0.0011 0.3338 37 0.0011 0.3262 38 0.0011 0.3247 39 0.0011 0.3213 40 0.0011 0.3034 41 0.0011 0.2955 42 0.0011 0.2863 43 0.0011 0.2801 44 0.0011 0.2782 45 0.0011 0.2726 46 0.0011 0.2721 47 0.0011 0.2685 48 0.0010 0.2600 49 0.0010 0.2406 50 0.0010 0.2398 51 0.0010 0.2253 52 0.0010 0.2119 53 0.0010 0.1960 ___________________________________________________________________ Stream Protection Duration POC #1 The Facility FAILED Facility FAILED duration standard for 1+ flows. Flow(cfs) Predev Mit Percentage Pass/Fail 0.0010 686 543043 79160 Fail 0.0014 148 498440 336783 Fail 0.0017 120 463315 386095 Fail 0.0021 98 434323 443186 Fail 0.0024 80 409420 511775 Fail 0.0027 61 388233 636447 Fail 0.0031 51 369834 725164 Fail 0.0034 48 353294 736029 Fail 0.0038 44 338426 769150 Fail 0.0041 38 325231 855871 Fail 0.0045 37 313337 846856 Fail 0.0048 33 302372 916278 Fail 0.0052 32 292336 913550 Fail 0.0055 30 283044 943480 Fail 0.0058 29 274681 947175 Fail 0.0062 27 266690 987740 Fail 0.0065 26 259256 997138 Fail 0.0069 22 252008 1145490Fail 0.0072 19 245317 1291142Fail 0.0076 18 238998 1327766Fail 0.0079 16 232866 1455412Fail 0.0083 16 227290 1420562Fail 0.0086 14 221715 1583678Fail 0.0089 13 216511 1665469Fail 0.0093 11 211493 1922663Fail 0.0096 9 206847 2298300Fail 0.0100 9 202387 2248744Fail 0.0103 9 198112 2201244Fail 0.0107 9 194024 2155822Fail 0.0110 8 189935 2374187Fail 0.0114 6 186404 3106733Fail 0.0117 5 182687 3653739Fail 0.0120 5 179212 3584239Fail 0.0124 5 175792 3515839Fail 0.0127 5 172614 3452280Fail 0.0131 5 169511 3390220Fail 0.0134 5 166425 3328500Fail 0.0138 5 163582 3271640Fail 0.0141 5 160646 3212920Fail 0.0145 4 157895 3947375Fail 0.0148 4 155089 3877225Fail 0.0151 4 152431 3810775Fail 0.0155 4 149848 3746200Fail 0.0158 4 147413 3685325Fail 0.0162 4 145016 3625400Fail 0.0165 3 142637 4754566Fail 0.0169 3 140351 4678366Fail 0.0172 3 138084 4602800Fail 0.0176 3 135947 4531566Fail 0.0179 3 133698 4456600Fail 0.0182 3 131616 4387200Fail 0.0186 3 129572 4319066Fail 0.0189 3 127639 4254633Fail 0.0193 3 125688 4189600Fail 0.0196 3 123792 4126400Fail 0.0200 3 121915 4063833Fail 0.0203 3 120187 4006233Fail 0.0207 3 118440 3948000Fail 0.0210 3 116693 3889766Fail 0.0213 2 115002 5750100Fail 0.0217 2 113255 5662750Fail 0.0220 2 111638 5581900Fail 0.0224 2 110040 5502000Fail 0.0227 2 108516 5425800Fail 0.0231 2 106936 5346800Fail 0.0234 2 105449 5272450Fail 0.0238 2 103962 5198100Fail 0.0241 2 102531 5126550Fail 0.0244 2 101193 5059650Fail 0.0248 2 99781 4989050Fail 0.0251 2 98499 4924950Fail 0.0255 2 97198 4859900Fail 0.0258 2 95952 4797600Fail 0.0262 2 94689 4734450Fail 0.0265 2 93425 4671250Fail 0.0269 2 92198 4609900Fail 0.0272 2 91083 4554150Fail 0.0275 2 89912 4495600Fail 0.0279 2 88760 4438000Fail 0.0282 2 87627 4381350Fail 0.0286 2 86493 4324650Fail 0.0289 2 85434 4271700Fail 0.0293 2 84337 4216850Fail 0.0296 2 83296 4164800Fail 0.0300 2 82256 4112800Fail 0.0303 2 81252 4062600Fail 0.0306 2 80323 4016150Fail 0.0310 2 79394 3969700Fail 0.0313 2 78427 3921350Fail 0.0317 2 77479 3873950Fail 0.0320 2 76624 3831200Fail 0.0324 2 75639 3781950Fail 0.0327 2 74692 3734600Fail 0.0331 2 73725 3686250Fail 0.0334 2 72870 3643500Fail 0.0338 2 71978 3598900Fail 0.0341 2 71142 3557100Fail 0.0344 2 70324 3516200Fail 0.0348 2 69469 3473450Fail 0.0351 2 68689 3434450Fail _____________________________________________________ The development has an increase in flow durations from 1/2 Predeveloped 2 year flow to the 2 year flow or more than a 10% increase from the 2 year to the 50 year flow. The development has an increase in flow durations for more than 50% of the flows for the range of the duration analysis. ___________________________________________________________________ Water Quality BMP Flow and Volume for POC #1 On-line facility volume: 0.1418 acre-feet On-line facility target flow: 0.1476 cfs. Adjusted for 15 min: 0.1476 cfs. Off-line facility target flow: 0.0827 cfs. Adjusted for 15 min: 0.0827 cfs. ___________________________________________________________________ LID Report LID Technique Used for Total Volume Volume Infiltration Cumulative Percent Water Quality Percent Comment Treatment? Needs Through Volume Volume Volume Water Quality Treatment Facility (ac-ft.) Infiltration Infiltrated Treated (ac-ft) (ac-ft) Credit Total Volume Infiltrated 0.00 0.00 0.00 0.00 0.00 0% No Treat. Credit Compliance with LID Standard 8 Duration Analysis Result = Failed ___________________________________________________________________ Perlnd and Implnd Changes No changes have been made. ___________________________________________________________________ This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions Inc. be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by : Clear Creek Solutions, Inc. 2005-2021; All Rights Reserved. Farrelli’s Yelm September 23, 2021 APPENDIX D – COMMERCIAL SOURCE CONTROL PLAN THURSTON COUNTY, WASHINGTON COMMERCIAL STORMWATER POLLUTION PREVENTION SOURCE CONTROL PLAN FOR: ASSESSOR’S PARCEL NUMBER(S):_____________________________ ____________________________________________ ORGANIZATION: _________________________________ ADDRESS: _______________________________________________ _______________________________________________________ DATE PREPARED/UPDATED:__________________________ RESPONSIBLE PERSON:_____________________________________ PHONE/E-MAIL:__________________________________ [THIS PAGE INTENTIONALLY LEFT BLANK] i Table of Contents 1.0 INTRODUCTION................................................................................................................1 1.1 OBJECTIVES OF THIS PLAN.....................................................................................1 1.2 INSTRUCTIONS FOR PREPARING PLAN................................................................1 1.3 ABOUT THIS PLAN.....................................................................................................2 1.4 BEST MANAGEMENT PRACTICES … WHAT ARE THEY? .................................2 1.4.1 SOURCE CONTROL BMPS......................................................................................2 1.4.2 TREATMENT BMPS..................................................................................................3 1.5 WHAT’S IN THIS PLAN?............................................................................................3 2.0 GENERAL PRINCIPLES OF POLLUTION PREVENTION ............................................4 3.0 GENERAL SOURCE CONTROL BMPS...........................................................................7 4.0 SITE / BUSINESS SPECIFIC BMPS..................................................................................9 TABLES TABLE 1 - GENERAL SOURCE CONTROL BMPS...............................................................7 TABLE 2 - OPERATIONAL SOURCE CONTROL PRACTICES SUMMARY...................10 ATTACHMENTS ATTACHMENT A – COMMERCIAL AND INDUSTRIAL ACTIVITIES WORKSHEET ATTACHMENT B – ACTIVITY SHEETS ATTACHMENT C – SPILL CONTROL PLAN ATTACHMENT D – INTEGRATED PEST MANAGEMENT PLAN ATTACHMENT E – ANNUAL REPORT CHECKLIST ATTACHMENT F – QUICK REFERENCE PHONE NUMBERS AND WEB SITES ii [THIS PAGE INTENTIONALLY LEFT BLANK] 1 1.0 Introduction 1.1 OBJECTIVES OF THIS PLAN 1. To implement and maintain best management practices (BMPs) that identify, reduce, eliminate and/or prevent the discharge of stormwater pollutants. 2. To prevent violations of surface water quality, groundwater quality, and sediment management standards. 3. To eliminate the discharges of un-permitted process wastewater, domestic wastewater, non-contact cooling water and other illicit discharges to stormwater drainage systems. 1.2 INSTRUCTIONS FOR PREPARING PLAN To customize this plan for your property/business do the following: 1. Complete the cover page with information on your information. 2. Complete the worksheet included in Attachment A by selecting those activities that apply to your property/business. 3. Copy and include in Attachment B the applicable activity sheets based on the activities selected in step 2. Copy the applicable pages of Chapter 4, Volume IV of the Thurston County Drainage Design and Erosion Control Manual that address the activities selected in step 2. 4. Complete Table 2 (Operational Source Control Practices Summary) in Section 4.0 referencing the applicable activity sheets from step 3. Indicate for each activity the required and recommended operational BMPs applicable to your business. 5. If an Emergency Spill Control Plan (SPC) is required, include it as Attachment C. This may be required for some business types. Prepare the plan using the appropriate guidance for your business practices (i.e. fueling, chemical handling, etc.). 6. If an Integrated Pest Management Plan (IPM) is required, include it as Attachment D. If one of your required BMPs is the use of an Integrated Pest Management Plan, prepare the plan using the appropriate guidance and include it as Attachment D. 7. Customize the Annual Report checklist included in Attachment E. This checklist needs to be completed and submitted with the Annual Report required as part of your Stormwater Agreement with Thurston County. If your business/property is not subject to a Stormwater Agreement, this checklist can be used internally to perform routine audits of your source control program. 2 1.3 ABOUT THIS PLAN All commercial and industrial properties and activities, including multi-family residential complexes (i.e. apartments, condominiums), non-residential special uses, and government facilities in unincorporated Thurston County that have the potential to contribute pollutants to stormwater runoff or directly to receiving waters are required to implement stormwater pollution prevention source control measures. Stormwater runoff may seep into the ground, drain to a storm drain or a drainage ditch, or flow over the ground. Regardless of the way runoff leaves your site, it ends up in a stream river, lake, wetland, groundwater or Puget Sound. All known, available and reasonable source control BMPs shall be applied. Source control BMPs shall be selected, designed, and maintained in accordance with Volume IV of the Thurston County Drainage Design and Erosion Control Manual. Many people believe that stormwater runoff is “clean” and does not harm water quality. This perception is understandable since the amount of pollution from any one place is not usually significant by itself. But when all these small amounts are combined, they can cause significant pollution problems. Contaminated stormwater can negatively affect every water body it enters. Therefore, this plan provides detailed information to reduce the contamination of surface water, groundwater, and stormwater from the property and/or business. The federal Clean Water Act mandates that cities and counties control the quality of stormwater runoff. One way to achieve this is to implement pollution prevention measures on individual properties. By following the “Best Management Practices” for your business as described in this plan you can do your part to protect our streams, groundwater, and Puget Sound. 1.4 BEST MANAGEMENT PRACTICES … WHAT ARE THEY? Best Management Practices (BMPs) are a set of activities designed to reduce stormwater pollution. BMPs are separated into two broad categories: source control and treatment. Applicable BMPs for your business can be selected from the most recent published edition of the Thurston County Drainage Design and Erosion Control Manual, Volume IV, “Source Control.” 1.4.1 Source Control BMPs Source control BMPs prevent contaminants from entering stormwater by controlling them at the source. Source control BMPs prevent contaminants from entering stormwater runoff by controlling them at the source. Some source control BMPs are operational, such as checking regularly for leaks and drips from equipment and vehicles, covering materials that have potential to add pollutants to surface water if rainwater comes in contact with the materials, and minimizing use of pesticides, fertilizers, and insecticides. Other source control BMPs require use of a structure to prevent rainwater from contacting materials that will contaminate stormwater runoff such as providing a covered area or berm to prevent clean stormwater from entering work or storage areas. 3 1.4.2 Treatment BMPs In contrast, treatments BMPs are structures that treat stormwater to remove contaminants. Treatment BMPs typically require planning, design and construction. A stormwater treatment pond is an example of a treatment BMP. No treatment BMP is capable of removing 100 percent of the contaminants in stormwater and the less contaminants in the stormwater the more effective the treatment BMP is. Just because there is a stormwater collection system serving your property, it does not necessarily mean that the stormwater is treated. Many sites were developed prior to requirements to treat stormwater. Runoff from your property may go directly or indirectly to a stream or wetland without any treatment. Keep in mind that runoff from your property may go directly or indirectly to a stream or wetland without any treatment. This plan focuses on source control BMPs applicable to the routine practices of your business. 1.5 WHAT’S IN THIS PLAN? This plan should be customized for your business. If you are trying to get a building permit you may be required to submit a copy of this plan, or its equivalent as part of your permit application and then record it with the Thurston County Auditor’s office prior to receiving final approval of your project. The plan is divided into sections as follows:  Introduction  General Principles of Pollution Prevention  Operational BMPs Applicable to All Facilities  Site/Business Specific BMPs  Attachments o A – Commercial and Industrial Activities Worksheet o B – Applicable Facility Activity Sheets o C – Spill Control Plan (If applicable) o D – Integrated Pest Management Plan (If applicable) o E – Annual Report Checklist o F – Quick Reference Phone Numbers and Web Sites 4 2.0 General Principles of Pollution Prevention There are 15 general principles of pollution prevention that every business owner should consider. This section describes the 15 general principles of pollution prevention that every business owner should consider. Most of these are common sense, “housekeeping” types of solutions. 1. Avoid the activity or reduce its occurrence Avoid potentially polluting activity or do it less frequently. Apply lawn care chemicals following directions and only as needed. Do not apply herbicides right before it rains. 2. Move the activity indoors Move a potentially polluting activity indoors out of the weather. This prevents runoff contamination and provides more control for a cleanup if a spill occurs. 3. Cleanup spills quickly Promptly contain and cleanup solid and liquid pollutant leaks and spills on exposed soil, vegetation, or paved areas. Use readily available absorbents such as kitty litter to absorb spills and then sweep up the material and dispose of it properly. Repair leaks on vehicles and equipment. 4. Use less material Don’t buy or use more material than you really need. This not only helps keep potential disposal, storage and pollution problems to a minimum, but will probably save you money. 5. Use the least toxic materials available Investigate the use of materials that are less toxic. For example, replace a caustic-type detergent or solvent with a more environmentally friendly product. If you do switch to a biodegradable product, remember that only uncontaminated water is allowed to enter the stormwater drainage system. Only uncontaminated water is allowed to enter the stormwater drainage system. 5 6. Create and maintain vegetated areas near activity locations Vegetation can filter pollutants out of stormwater. Route stormwater from parking and work areas through vegetated areas. Remember that wastewater other than stormwater runoff, such as wash water, must be discharged to a wastewater collection system (sewer or septic system). 7. Locate activities as far as possible from surface drainage paths Locate activities away from storm drains, ditches, streams, and other water bodies to reduce the potential to pollute. It will take longer for material to reach the drainage features providing more time to react to a spill, or “housekeeping” issue and protect local waters long enough to cleanup. 8. Maintain stormwater drainage systems Pollutants concentrate over time in catch basins, ditches, and storm drains. When a storm event occurs, turbulent runoff can mobilize these pollutants and carry them to receiving waters. Perform regular maintenance on stormwater facilities to prevent this from occurring. 9. Reduce, reuse, and recycle as much as possible Look for ways to recycle. This saves money and keeps hazardous and non-hazardous materials out of landfills. Contact the Thurston County Solid Waste Division at (360) 357-2491 for more information on recycling opportunities at the Thurston County Waste and Recover Center. 10. Be an advocate for stormwater pollution prevention Help friends, neighbors, and business associates find ways to reduce stormwater pollution in their activities. Most people want clean water and do not pollute intentionally. Share your ideas and the BMPs in this plan to get them thinking about how their everyday activities affect water quality. 11. Report problems We all must do our part to protect water, fish, wildlife, and our own health by implementing proper BMPs, and reporting water quality problems that we observe. Call the Thurston County Stormwater Utility at (360) 754-4681 to report dumping to storm drains or ditches. 12. Provide oversight and training Talk to your employees, or if you are a landlord talk to your tenants, to ensure they understand the pollution prevention source control measures and BMPs described in this plan. If you are a landlord, you are still responsible for the activities of your tenants. Monitor the activities of your tenants to ensure that they are carrying out the principles of this plan. Do not hose down pollutants from any area to the ground, storm drain, conveyance ditch or any receiving water (stream, wetland, lake, etc.) 6 13. Dust control Sweep parking and storage areas regularly to collect and dispose of dust and debris that could contaminate stormwater. Do not hose down pollutants from any area to the ground, storm drain, conveyance ditch or any receiving water (stream, wetland, lake, etc.). Do not use oil or other petroleum products for dust control. Only light watering of dirt or gravel roads or parking areas should be conducted to prevent any runoff of stormwater from the surface. 14. Eliminate illicit connections Occasionally businesses have internal building drains, sump overflows, sump pumps, outdoor sinks and showers, and even sanitary sewer and septic system pipes that were inadvertently connected to the storm drainage system in the past. Examine the plumbing system for your business to determine if illicit connections exist. Toilets, sinks, appliances, showers, bathtubs, floor drains, industrial process waters, and other indoor activities found to be connected to the stormwater drainage system must be immediately rerouted to the sanitary sewer or septic system, holding tanks, or process treatment system. For assistance in methods to detect and eliminate illicit connections contact the Thurston County Stormwater Utility at (360) 754-4681. 15. Dispose of waste properly Every business and residence in Thurston County must dispose of solid and liquid wastes and contaminated stormwater properly. There are generally four options for disposal depending on the type of materials. These options include:  Sanitary sewer and septic systems.  Recycling facilities  Municipal solid waste disposal facilities  Hazardous waste treatment, storage and disposal facilities. Do not use oil or other petroleum products for dust control. Only light watering of dirt or gravel roads or parking areas should be conducted to prevent runoff… 7 3.0 General Source Control BMPs This section briefly summarizes source control BMPs that are generally applicable to all types of sites. In the next section BMPs specific to your business will be identified. In some cases the Activity Sheet will reference the BMPs in this section. In that case the Thurston County Drainage Design and Erosion Control Manual, Volume IV, Chapter 5, should be referenced for more detail on these general source control BMPs. TABLE 1: GENERAL SOURCE CONTROL BMPS BMP CATEGORY DESCRIPTION √ S.1 Eliminate Illicit Stormwater Drainage System Connections 1. Use building and site plans and examine plumbing systems to determine if illegal connections exist. 2. Consider dye testing to determine where a pipe or structure drains. 3. Consider smoke testing (best done by qualified professional). 4. Contact Thurston County (360) 754-4681 for assistance. 5. Plug, disconnect or reroute to sewer/septic system any drains found connected to the stormwater drainage system. S.2 Dispose of Collected Runoff and Waste Materials Properly 1. Discharge liquid wastes and contaminated stormwater to the sanitary sewer – contact LOTT or local sewer provider for restrictions. 2. Use sumps or holding tanks for temporary storage. 3. Consider recycling materials where feasible. 4. Dispose of solid wastes to Thurston County WARC. 5. Dispose of dangerous or hazardous wastes at permitted facility. 6. Contact Thurston County for disposal options (360)754-4581. S.3 Connect Process Water Discharges to Sanitary Sewer, Holding Tank, or Water Treatment System 1. Required for all industrial and commercial activities that generate contaminated process wastewater. 2. Discharge to sanitary sewer - contact LOTT or local sewer provider for restrictions. 2. Discharge to sumps or holding tanks for temporary storage – have tanks pumped for proper disposal. 3. Construct wastewater treatment system – contact Ecology for permitting requirements. 4. If activity is conducted outdoors cover the activity and/or construct curbs, dikes or berms to prevent stormwater run-on. S.4 Cover the Activity with a Roof or Awning 1. Construct simple roof or awning to prevent contact with stormwater. 2. Contact Thurston County for information on permits-(360) 786-5490. 3. The area of roof cover should be sufficient to prevent precipitation from reaching the covered materials. 8 BMP CATEGORY DESCRIPTION √ S.5 Cover the Activity with an Anchored Tarpaulin or Plastic Sheet 1. Use where raw materials are stockpiled outdoors. 2. Use weights such as bricks, tires, or sandbags to anchor the cover. 3. Use pins or stakes to anchor tarpaulin to the ground. 4. Locate stockpile to provide wind protection (leeward side of buildings, landscaping, etc.) 5. Inspect daily. S.6 Pave the Activity Area and Slope to a Sump or Holding Tank 1. Apply to activities that cannot be covered adequately but that may be susceptible to spills such as chemical storage areas. 2. Enclose area within a dike, curb or berm. 3. Provide a sump or holding tank to contain spills until the liquids can be pumped out and disposed properly. 4. Ensure paving is compatible with stored material, e.g. gasoline can breakdown asphalt – use concrete paving. S.7 Surround the Activity Area with a Curb, Dike, or Berm or elevate the Activity 1. Containment is most applicable to spill control situations. 2. If used to prevent run-on to a covered activity area place the berm underneath the covering so rain water will not pond inside it. 3. Size containment area for 6-month storm unless other containment sizing restrictions apply. 4. Install a valve in storm drainage line from area so that excess clean stormwater can be drained from area. 5. For storage of small items, consider a tub, wading pool, or specially manufactured containment systems. 6. For spill control the volume of the containment should be the greater of either 110% of the volume of the largest tank, or 10% of the volume of all tanks if there are multiple tanks. S.8 Implement Integrated Pest Management Measures 1. IPM may be required by Thurston County Code. 2. Commercial, agricultural, municipal and other large scale pesticide users should adhere to integrated pest management principles. 3. Guidance information is available from Thurston County Environmental Health, the Washington State Department of Agriculture and Washington State University Extension Service. 4. If an IPM plan is required, include as Attachment D. S.9 Clean Catch Basins 1. Catch basins should be cleaned regularly. 2. Several companies offer catch basin cleaning services; check the yellow pages under “sewer cleaning equipment and supplies.” A list of local service providers is available at: www.co.thurston.wa.us/stormwater/facilities/facilities-contractors.html 3. Do not flush catch basin sumps into the catch basin outlet pipe. 4. Check your stormwater Maintenance Plan for additional information on catch basin cleaning frequency and inspection requirements. 9 4.0 Site / Business Specific BMPS Every business in Thurston County is required to use the BMPs described in the Thurston County Drainage Manual to control stormwater pollution. Table 2 (following pages) should be completed and include a list of all activities identified on the worksheet (Attachment A). Review the applicable Activity Sheet (should be included in Attachment B) and summarize those required and suggested BMPs or actions that are appropriate for your property/ business. This table should be posted in an appropriate location for employees to see. [THIS AREA INTENTIONALLY BLANK] 10 [INSERT BUSINESS NAME] TABLE 2 – OPERATIONAL SOURCE CONTROL PRACTICES SUMMARY [Note: A1.1 is listed as an example. Complete similar entries for all applicable activities. Add or delete rows to table as necessary to complete table. ] ACTIVITY SOURCE CONTROL BMPS (SEE ACTIVITY SHEET IN ATTACHMENT B FOR MORE INFORMATION) √ A1.1 Cleaning or Washing Tools, Engines, and Manufacturing Equipment Required Practices: 1. Eliminate illicit connections to storm drain system 2. Train employees to control washing operations 3. Washwater should never discharge to stormwater system 4. Pressure wash only in designated area provided with sump drain Suggested Practices: 1. Use least toxic cleaner capable of doing the job. 2. Limit amount of water used 3. Recycle washwater if possible 11 ACTIVITY SOURCE CONTROL BMPS (SEE ACTIVITY SHEET IN ATTACHMENT B FOR MORE INFORMATION) √ 12 ACTIVITY SOURCE CONTROL BMPS (SEE ACTIVITY SHEET IN ATTACHMENT B FOR MORE INFORMATION) √ ACTIVITIES WORKSHEET A-1 ATTACHMENT A COMMERCIAL AND INDUSTRIAL ACTIVITIES WORKSHEET This worksheet and the associated BMPs are organized by business activity. The goal of BMPs is to ensure that only uncontaminated stormwater is discharged into any stormwater drainage system. Complete the entire worksheet by checking the appropriate boxes for all activities that occur at your work place. If you checked off any of the activities that are being performed outdoors or can drain to the stormwater drainage system, use the activity code on the worksheet to find the BMPs recommended for you in Chapter 4 of Volume IV of the Thurston County Drainage Design and Erosion Control Manual. If you perform an activity indoors and control all discharges from the activity (e.g., process water, washwater, lubricants, solvents, fugitive dust, granular material, blow down waste) so that no stormwater exposure occurs, you do not have to institute BMPs for that activity. If you have questions, please contact the Thurston County Stormwater Utility at (360) 754-4681. They can provide assistance over the phone and also at your business site. Check if You Are Involved in This Activity Code Type of Activity Indoor Outdoor A1.1 Cleaning or Washing of Tools, Engines, and Manufacturing Equipment  Includes parts washers and all types of manufactured equipment components. A1.2 Cleaning or Washing of Cooking Equipment  Includes vents, filters, pots and pans, grills, and related items. A1.3 Washing, Pressure Washing, and Steam Cleaning of Vehicles/Equipment/Building Structures  Includes cleaning and washing at all types of establishments, including fleet vehicle yards, car dealerships, car washes, and maintenance facilities. A1.4 Collection and Disposal of Wastewater from Mobile Interior Washing Operations  Includes carpet cleaners, upholstery cleaners, and drapery cleaners. A2.1 Loading and Unloading Areas for Liquid or Solid Material  Includes raw materials, intermediate products, finished products, waste, or fuel. ACTIVITIES WORKSHEET A-2 Check if You Are Involved in This Activity Code Type of Activity Indoor Outdoor A2.2 Fueling at Dedicated Stations  Includes gas stations, pumps at fleet vehicle yards or shops, and other privately owned pumps. A2.3 Engine Repair and Maintenance  This covers oil changes and other engine fluids. A2.4 Mobile Fueling of Vehicles and Heavy Equipment  Includes fleet fueling, wet fueling, and wet hosing. A3.1 Concrete and Asphalt Mixing and Production at Stationary Sites  Applies to mixing of raw materials on site to produce concrete or asphalt. A3.2 Concrete Pouring, Concrete Cutting, and Asphalt Application at Temporary Sites  Includes construction sites, and driveway and parking lot resurfacing. A3.3 Manufacturing and Post-processing of Metal Products  Includes machining, grinding, soldering, cutting, welding, quenching, rinsing, etc. A3.4 Wood Treatment Areas  Includes wood treatment using pressure processes or by dipping or spraying. A3.5 Commercial Composting  Includes commercial composting facilities operating outside. A3.6 Landscaping and Vegetation Management Activities, Including Vegetation Removal, Herbicide and Insecticide Application, Fertilizer Application, Irrigation, Watering, Gardening, and Lawn Care  Includes businesses involved in landscaping, applying pesticides and managing vegetation. A3.7 Painting, Finishing, and Coating of Vehicles, Boats, Buildings, and Equipment  Includes surface preparation and the applications of paints, finishes, and/or coatings. A3.8 Commercial Printing Operations  Includes materials used in the printing process. A3.9 Manufacturing Activities – Outside  Includes outdoor manufacturing areas. A3.10 Agricultural Crop Production  Includes commercial scale farming. A3.11 Application of Pesticides, Herbicides, Fungicides and Rodenticides for purposes other than landscaping  Includes moss removal and outdoor insect extermination. ACTIVITIES WORKSHEET A-3 Check if You Are Involved in This Activity Code Type of Activity Indoor Outdoor A4.1 Storage or Transfer (Outside) of Solid Raw Materials, By-products, or Finished Products A4.2 Storage and Treatment of Contaminated Soils  This applies to contaminated soils that are excavated and left on site. A4.3 Temporary Storage or Processing of Fruits or Vegetables  Includes processing activities at wineries, fresh and frozen juice makers, and other food and beverage processing operations. A4.4 Storage of Solid Wastes and Food Wastes  Includes regular garbage and all other discarded non-liquid items. A4.5 Recyclers and Scrap Yards  Includes scrapped equipment, vehicles, empty metal drums, and assorted recyclables. A4.6 Treatment, Storage, or Disposal of Dangerous Wastes  Refer to Ecology and the Thurston County Health Department for more information, see Chapter 7. A4.7 Storage of Liquid, Food Waste, or Dangerous Waste Containers  Includes containers located outside a building and used for temporary storage. A4.8 Storage of Liquids in Permanent Aboveground Tanks  Includes all liquids in aboveground tanks. A4.9 Parking and Storage for Vehicles and Equipment  Includes public and commercial parking lots A4.10 Storage of Pesticides, Fertilizers, or other products that can leach pollutants A5.1 Demolition of Buildings  Applies to removal of existing buildings and subsequent clearing of the rubble. A5.2 Building Repair, Remodeling, and Construction  Applies to construction of buildings, general exterior building repair work and remodeling of buildings. A6.1 Dust Control at Disturbed Land Areas and Unpaved Roadways and Parking Lots A6.2 Dust Control at Manufacturing Sites  Includes grain dust, sawdust, coal, gravel, crushed rock, cement, and boiler fly ash. ACTIVITIES WORKSHEET A-4 Check if You Are Involved in This Activity Code Type of Activity Indoor Outdoor A6.3 Soil Erosion and Sediment Control (ESC) at Industrial Sites  Includes industrial activities that take place on soil. A7.1 Commercial Animal Handling Areas  Includes kennels, fenced pens, veterinarians, and businesses that board animals. A7.2 Keeping Livestock in Stables, Pens, Pastures or Fields  Applies to all types of livestock. A7.3 Log Sorting and Handling  Applies to log yards typically located at sawmills, ports, and pulp mills. A7.4 Boat Building, Mooring, Maintenance, and Repair  Includes all types of maintenance, repair, and building operations. A7.5 Logging  Applies to logging activities that fall under Class IV general forest practices. A7.6 Mining and Quarrying of Sand, Gravel, Rock, Minerals, Peat, Clay, and Other Materials  This does not include excavation at construction sites. A7.7 Swimming Pool and Spa Cleaning and Maintenance  Includes every swimming pool and spa not at a single family residence. Commercial pool cleaners are included here for all pools. A7.8 De-icing and Anti-icing Operations for Airports and Streets  Includes aircraft, runways/taxiways, streets and highways. A7.9 Roof and Building Drains at Manufacturing and Commercial Buildings  These sites will be referred to ORCAA. A7.10 Urban Streets  BMPs for addressing pollutants found on paved surfaces, including street sweeping. A7.11 Railroad Yards A7.12 Maintenance of Public and Private Utility Corridors and Facilities  Includes public and private utility maintenance activities. A7.13 Maintenance of Roadside Ditches A7.14 Maintenance of Stormwater Drainage and Treatment Facilities A7.15 Spills of Oil and Hazardous Substances ACTIVITY SHEETS B-1 ATTACHMENT B ACTIVITY SHEETS Best Management Practices for Commercial and Industrial Activities This Attachment coordinates with the worksheet in Attachment A. That worksheet and the BMPs are organized by the different activities that businesses perform. If you checked the column for activities performed outdoors, match the number from the worksheet to the activities listed in Volume IV, Chapter 4 of the Thurston County Drainage Design and Erosion Control Manual to find the suggested BMPs you should implement. Make photocopies of the applicable Activity Sheets and insert them in this section. Use the Activity Sheets to prepare a summary of the applicable required and suggested BMPs for inclusion in Table 2 (Section 4). Explanation of Required BMPs Every business in Thurston County is required to use the BMPs described in the Thurston County Drainage Design and Erosion Control Manual to control stormwater pollution. In some instances, there are BMPs mandated by various federal, state, or county laws. If you are subject to those laws and regulations via another permit or formal regulatory approval, you are encouraged, but not required to use additional BMPs to further protect water quality. The BMPs outlined in this section are focused on source control: that is, methods to prevent pollution from reaching stormwater in the first place. The use of source control BMPs is always the first line of defense in stormwater pollution prevention. ACTIVITY SHEETS B-2 [ATTACH APPLICABLE ACTIVITY SHEETS PHOTO COPIED FROM THE THURSTON COUNTY DRAINAGE DESIGN AND EROSION CONTROL MANUAL, VOLUME V, SECTION 4] SPILL CONTROL PLAN C-1 ATTACHMENT C SPILL CONTROL PLAN [NOTE: IF REQUIRED, ATTACH THE COMPLETED SPILL CONTROL PLAN] SPILL CONTROL PLANNING GUIDANCE If required to prepare and implement an Emergency Spill Cleanup Plan follow the appropriate guidance required for your activity. General guidelines for implementing an Emergency Spill Cleanup Plan include:  Prepare an Emergency Spill Control Plan (SCP), which includes: o A description of the facility including the owner's name and address and the name of the designated person with spill cleanup and notification responsibility. o The nature of the activity at the facility; o The general types of chemicals used or stored at the facility; o A site plan showing the location of storage areas for chemicals, the locations of storm drains, the areas draining to them, and the location and description of any devices to stop spills from leaving the site such as positive control valves; o Cleanup procedures; o Notification procedures to be used in the event of a spill, such as notifying key personnel, the fire department, Ecology, State Patrol, and the local Sewer Authority.  Train key personnel. Prepare a summary of the plan and post it at appropriate points in the building, identifying the spill cleanup coordinators, location of cleanup kits, and phone numbers of regulatory agencies to be contacted in the event of a spill;  Update the SCP regularly;  Immediately notify Ecology and the local Sewer Authority if a spill may reach sanitary or storm sewers, ground water, or surface water, in accordance with spill reporting requirements;  Immediately clean up spills. Do not use emulsifiers unless an appropriate disposal method for the resulting oily wastewater is implemented. Absorbent material shall not be washed down a floor drain or storm sewer; and,  Locate emergency spill containment and cleanup kit(s) in high potential spill areas. The contents of the kit shall be appropriate for the type and quantities of chemical liquids stored at the facility. Spill Kit Contents: Spill kits should include appropriately lined drums, absorbent pads, and granular or powdered materials for neutralizing acids or alkaline liquids where applicable. In fueling areas: absorbent should be packaged in small bags for easy use and small drums should be available for storage of absorbent and/or used absorbent. Spill kits should be deployed in a manner that allows rapid access and use by employees. SPILL CONTROL PLAN C-2 [ATTACH SPILL CONTROL PLAN] INTEGRATED PEST MANAGEMENT D-1 ATTACHMENT D INTEGRATED PEST MANAGEMENT PLAN [NOTE: IF YOU ARE REQUIRED TO PREPARE AN INTEGRATED PEST MANAGEMENT PLAN ATTACH THE COMPLETED PLAN TO THIS SECTION] INTEGRATED PEST MANAGEMENT GUIDANCE Integrated Pest and Vegetation Management (IPM) is a natural, long-term, ecologically-based systems approach to controlling pest populations. IPM is used to reduce pest populations, maintain them at levels below those causing health concerns or economic damage. The goals of IPM are to both encourage optimal selective pesticide use (away from prophylactic, broad spectrum use), and to maximize natural controls to minimize environmental side effects. Thurston County requires Integrated Pest Management Plans for certain land use projects located in Category I or II Aquifer Recharge Areas, where drinking water sources are vulnerable to contamination. These include: 1. Subdivisions of 10 lots or greater (excluding large lots). 2. Any land use project that incorporates maintained open space totally more than five acres. 3. All land use projects located within a delineated wellhead capture zone for a Group A public water supply. For more information on Thurston County’s IPM policy, visit the County web site at: http://www.co.thurston.wa.us/health/ehipm/index.html Introduction True integrated pest and vegetation management is a powerful approach that anticipates and prevents most problems through appropriate cultural practices and careful observation. Knowledge of the life cycles of host plants and both beneficial and pest organisms is also important. The integrated pest management section of this guidance is adapted from Least Toxic Pest Management for Lawns by Sheila Daar. Following the integrated pest management process gives you the information you need to minimize damage by weeds, diseases, and pests and to treat those problems with the least toxic approaches. INTEGRATED PEST MANAGEMENT D-2 The IPM Process Step One: Correctly identify problem pests and understand their life cycle. Learn more about the pest. Observe it and pay attention to any damage that may be occurring. Learn about the life cycle. Many pests are only a problem during certain seasons, or can only be treated effectively in certain phases of the life cycle. Step Two: Establish tolerance thresholds for pests. Every landscape has a population of some pest insects, weeds, and diseases. This is good because it supports a population of beneficial species that keep pest numbers in check. Beneficial organisms may compete with, eat, or parasitize disease or pest organisms. Decide on the level of infestation that must be exceeded before treatment needs to be considered. Pest populations under this threshold should be monitored but don’t need treatment. For instance, European crane flies usually don’t do serious damage to a lawn unless there are 25 to 40 larvae per square foot feeding on the turf in February (in normal weather years). Also, most people consider a lawn healthy and well maintained even with up to 20 percent weed cover, so treatment, other than continuing good maintenance practices, is generally unnecessary. Step Three: Monitor to detect and prevent pest problems. Regular monitoring is a key practice to anticipate and prevent major pest outbreaks. It begins with a visual evaluation of the lawn or landscape's condition. Take a few minutes before mowing to walk around and look for problems. Keep a notebook, record when and where a problem occurs, then monitor for it at about the same time in future years. Specific monitoring techniques can be used in the appropriate season for some potential problem pests, such as European crane fly. Step Four: Modify the maintenance program to promote healthy plants and discourage pests. A healthy landscape is resistant to most pest problems. Lawn aeration and over-seeding along with proper mowing height, fertilization, and irrigation will help the grass out-compete weeds. Correcting drainage problems and letting soil dry out between waterings in the summer may reduce the number of crane-fly larvae that survive. Step Five: If pests exceed the tolerance thresholds … Use cultural, physical, mechanical, or biological controls first. If those prove insufficient, use the chemical controls described below that have the least non-target impact. When a pest outbreak strikes (or monitoring shows one is imminent), implement integrated pest management then consider control options that are the least toxic, or have the least non-target impact. Here are two examples of an integrated pest management approach: 1. Red thread disease is most likely under low nitrogen fertility conditions and most severe during slow growth conditions. Mow and bag the clippings to remove diseased blades. Fertilize lightly to help the grass recover, then begin grasscycling and change to fall fertilization with a slow-release or natural-organic fertilizer to provide an even INTEGRATED PEST MANAGEMENT D-3 supply of nutrients. Chemical fungicides are not recommended because red thread cannot kill the lawn. 2. Crane fly damage is most prevalent on lawns that stay wet in the winter and are irrigated in the summer. Correct the winter drainage and/or allow the soil to dry between irrigation cycles; larvae are susceptible to drying out, so these changes can reduce their numbers. It may also be possible to reduce crane fly larvae numbers by using a power de-thatcher on a cool, cloudy day when feeding is occurring close to the surface. Studies are being conducted using beneficial nematodes that parasitize the crane fly larvae; this type of treatment may eventually be a reasonable alternative. Only after trying suitable non-chemical control methods or determining that the pest outbreak is causing too much serious damage, should chemical controls be considered. If chemical controls prove necessary, determine what products are available and choose a product that is the least toxic and has the least non-target impact. Refer to the operational BMPs for the use of pesticides below for guidelines on choosing, storing, and using lawn and garden chemicals. Step Six: Evaluate and record the effectiveness of the control, and modify maintenance practices to support lawn or landscape recovery and prevent recurrence. Keep records! Note when, where, and what symptoms occurred, or when monitoring revealed a potential pest problem. Note what controls were applied and when, and the effectiveness of the control. Monitor next year for the same problems. Review your landscape maintenance and cultural practices to see if they can be modified to prevent or reduce the problem. A comprehensive integrated pest management program should also include the proper use of pesticides as a last resort, and vegetation/fertilizer management to eliminate or minimize the contamination of stormwater. INTEGRATED PEST MANAGEMENT D-4 [ATTACH INTEGRATED PEST MANAGEMENT PLAN] ANNUAL REPORT CHECKLIST E-1 ATTACHMENT E ANNUAL REPORT CHECKLIST ANNUAL REPORT CHECKLIST E-2 SOURCE CONTROL ANNUAL REPORT CHECKLIST Your stormwater pollution prevention plan should be reviewed at least annually and updated as required. The following checklist should be completed and submitted to Thurston County along with the annual report required as part of your Stormwater Maintenance Agreement with Thurston County. If your project did not require a Stormwater Maintenance Agreement and Maintenance Plan then submittal of this annual report is not required. If submittal is required it should be mailed or hand delivered to: Thurston County Stormwater Utility; 929 Lakeridge Drive SW, Bldg 4, Room 100; Olympia, Washington 98502. BUSINESS NAME: ADDRESS: ASSESSOR’S PARCEL NUMBER: COMPLETED BY: SIGNATURE: DATE: √ ACTIVITY NOTES Review Activity Checklist (Attachment A) – Verify still current. List any new activities. Review and Update Attachment B if new activities are identified. Review and Update Table 2 for New Activities ANNUAL REPORT CHECKLIST E-3 √ ACTIVITY NOTES Was any employee training held? If so describe. Review Table 2 and verify compliance. Attach copy indicating each item has been checked. Describe any significant events such as spills, illicit discharges detected/fixed, etc. Was catch basin cleaning conducted? If so when, and by what company. Conduct visual inspection of property for evidence of leaks, improper operations, etc. Note any items requiring attention. Is a copy of Table 2 posted where visible to employees? ANNUAL REPORT CHECKLIST E-4 √ ACTIVITY NOTES Have any additional structural or treatment BMPs been implemented on the site since the last annual report was submitted? If so describe. Any other items related to stormwater source control not noted above? Describe. Do you desire any technical assistance from Thurston County related to stormwater issues? If so, indicate contact person and phone number. F-1 ATTACHMENT F QUICK REFERENCE PHONE NUMBERS AND WEB SITES PHONE NUMBERS Environmental Protection Agency (U.S. EPA) – Region X 800-424-4372 Thurston County: Stormwater Utility 360-754-4681 Department of Public Works 360-754-4581 After-hours water and sewer emergencies (paging service) 800-926-7761 Thurston County Waste Line (automated information) 360-786-5494 LOTT Alliance Industrial Pretreatment Program 360-528-5708 Development Services – Permits 360-786-5490 Weed Control/ Noxious Chemical Use 360-786-5576 Thurston County Public Health and Social Services Department: On-Site Sewage 360-754-3355 x 6518 Asbestos Removal 360-786-5461 Hazardous Waste Section 360-786-5457 Solid Waste 360-786-5461 University of Washington Center for Urban Water Resources 206-543-6272 Washington State Department of Agriculture 360-902-2010 877-301-4555 Washington State Department of Ecology 360-407-6000 Southwest Regional Office 360-407-6300 Dangerous/Hazardous Waste 360-407-6300 NPDES Stormwater or Wastewater Permits 360-407-6400 Spill Reporting 800-424-8802 Recycling 800-732-9253 Groundwater Quality and Protection 360-407-6400 Underground and Aboveground Storage Tanks 360-407-7170 Washington State University/Thurston County Cooperative Extension 360-867-2151 Industrial Materials Exchange 206-296-4899 Nisqually Tribe 360-456-5221 Confederated Tribes of the Chehalis 360-273-5911 Olympic Region Clean Air Agency (ORCAA) 800-422-5623 Underground Utility Locate “Call Before You Dig” 800-424-5555 F-2 WEB PAGES Washington State Departments: Washington State Department of Health <http://www.doh.wa.gov/> Washington Department of Fish and Wildlife <http://wdfw.wa.gov/> Washington State Government Information and Services <http://www.access.wa.gov/> Washington State Department of Ecology – Flood Information <http://www.ecy.wa.gov/programs/sea/floods/> Washington State Department of Ecology - Digital Coastal Atlas <http://www.ecy.wa.gov/programs/sea/SMA/atlas_home.html> Washington State Department of Ecology - Stormwater Home Page <http://www.ecy.wa.gov/programs/wq/stormwater/index.html> Salmon and Watershed Information Management (SWIM) Team <http://www.swim.wa.gov/> Federal Departments: Federal Emergency Management Agency (FEMA) <http://fema.gov/> U.S. EPA Office of Water, Academy 2000 <http://epa.gov/watertrain/> U.S. Geological Survey (USGS) Departments: USGS Historical Water Resource Data <http://wa.water.usgs.gov/realtime/historical.html> USGS National Water Information System (NWISWeb) <http://water.usgs.gov/nwis/> TerraServer (zoom in on USGS aerial photos anywhere in the USA) <http://terraserver-usa.com/> F-3 Water Quality and NPDES: Natural Resources Conservation Service (NRCS) and U.S. Department of Agriculture (USDA) <http://www.nrcs.usda.gov/> National Climatic Data Center Data Archive <http://www.ncdc.noaa.gov/> National Weather Service Hydrologic Forecasts (River Flooding) <http://ahps2.wrh.noaa.gov/ahps2/index.php?wfo=sew> USGS Real Time Gauging Info <http://wa.water.usgs.gov/realtime/current.html> U.S. Army Corps of Engineers Real Time Gauge Info <http://www.nwd-wc.usace.army.mil/nws/hh/basins/puy.html> The Central Puget Sound Water Suppliers' Forum <http://www.ci.seattle.wa.us/Forum> Thurston County: Thurston County Homepage <http://www.co.Thurston.wa.us/> Thurston County Stormwater Utility < http://www.co.thurston.wa.us/stormwater/> Thurston County Mapping <http://www.geodata.org> Thurston Conservation District <http://www.Thurstoncountycd.org/> Thurston County Public Health and Social Services <http://www.co.thurston.wa.us/health/ehadm/index.html> Other Agencies: NWS River Forecast Center - Flood Outlook <http://www.nwrfc.noaa.gov/river/fop.cgi> NOAA Tide and Current Predictions <http://co-ops.nos.noaa.gov/tp4days.html>